drop table if exists t1,t2,t3;
set time_zone="+03:00";
select from_days(to_days("960101")),to_days(960201)-to_days("19960101"),to_days(date_add(curdate(), interval 1 day))-to_days(curdate()),weekday("1997-11-29");
from_days(to_days("960101"))	to_days(960201)-to_days("19960101")	to_days(date_add(curdate(), interval 1 day))-to_days(curdate())	weekday("1997-11-29")
1996-01-01	31	1	5
select period_add("9602",-12),period_diff(199505,"9404") ;
period_add("9602",-12)	period_diff(199505,"9404")
199502	13
select now()-now(),weekday(curdate())-weekday(now()),unix_timestamp()-unix_timestamp(now());
now()-now()	weekday(curdate())-weekday(now())	unix_timestamp()-unix_timestamp(now())
0	0	0
select from_unixtime(unix_timestamp("1994-03-02 10:11:12")),from_unixtime(unix_timestamp("1994-03-02 10:11:12"),"%Y-%m-%d %h:%i:%s"),from_unixtime(unix_timestamp("1994-03-02 10:11:12"))+0;
from_unixtime(unix_timestamp("1994-03-02 10:11:12"))	from_unixtime(unix_timestamp("1994-03-02 10:11:12"),"%Y-%m-%d %h:%i:%s")	from_unixtime(unix_timestamp("1994-03-02 10:11:12"))+0
1994-03-02 10:11:12.000000	1994-03-02 10:11:12	19940302101112.000000
select sec_to_time(9001),sec_to_time(9001)+0,time_to_sec("15:12:22"),
sec_to_time(time_to_sec("0:30:47")/6.21);
sec_to_time(9001)	sec_to_time(9001)+0	time_to_sec("15:12:22")	sec_to_time(time_to_sec("0:30:47")/6.21)
02:30:01	23001	54742.000000	00:04:57.423510
select sec_to_time(9001.1), time_to_sec('15:12:22.123456'), time_to_sec(15.5566778899);
sec_to_time(9001.1)	time_to_sec('15:12:22.123456')	time_to_sec(15.5566778899)
02:30:01.1	54742.123456	15.556677
select sec_to_time(time_to_sec('-838:59:59'));
sec_to_time(time_to_sec('-838:59:59'))
-838:59:59.000000
select sec_to_time('9001.1'), sec_to_time('1234567890123.123');
sec_to_time('9001.1')	sec_to_time('1234567890123.123')
02:30:01.100000	838:59:59.999999
Warnings:
Warning	1292	Truncated incorrect time value: '1234567890123.123'
select sec_to_time(-9001.1), sec_to_time(-9001.1) / 1,
sec_to_time(-9001.1) / 1e0, sec_to_time(-9001) div 1;
sec_to_time(-9001.1)	sec_to_time(-9001.1) / 1	sec_to_time(-9001.1) / 1e0	sec_to_time(-9001) div 1
-02:30:01.1	-23001.10000	-23001.1	-23001
select sec_to_time(90011e-1), sec_to_time(1234567890123e30);
sec_to_time(90011e-1)	sec_to_time(1234567890123e30)
02:30:01.100000	838:59:59.999999
Warnings:
Warning	1292	Truncated incorrect time value: '1.234567890123e42'
select sec_to_time(1234567890123), sec_to_time('99999999999999999999999999999');
sec_to_time(1234567890123)	sec_to_time('99999999999999999999999999999')
838:59:59	838:59:59.999999
Warnings:
Warning	1292	Truncated incorrect time value: '1234567890123'
Warning	1292	Truncated incorrect time value: '99999999999999999999999999999'
select now()-curdate()*1000000-curtime();
now()-curdate()*1000000-curtime()
0
select strcmp(current_timestamp(),concat(current_date()," ",current_time()));
strcmp(current_timestamp(),concat(current_date()," ",current_time()))
0
select strcmp(localtime(),concat(current_date()," ",current_time()));
strcmp(localtime(),concat(current_date()," ",current_time()))
0
select strcmp(localtimestamp(),concat(current_date()," ",current_time()));
strcmp(localtimestamp(),concat(current_date()," ",current_time()))
0
select date_format("1997-01-02 03:04:05", "%M %W %D %Y %y %m %d %h %i %s %w");
date_format("1997-01-02 03:04:05", "%M %W %D %Y %y %m %d %h %i %s %w")
January Thursday 2nd 1997 97 01 02 03 04 05 4
select date_format("1997-01-02", concat("%M %W %D ","%Y %y %m %d %h %i %s %w"));
date_format("1997-01-02", concat("%M %W %D ","%Y %y %m %d %h %i %s %w"))
January Thursday 2nd 1997 97 01 02 12 00 00 4
select dayofmonth("1997-01-02"),dayofmonth(19970323);
dayofmonth("1997-01-02")	dayofmonth(19970323)
2	23
select month("1997-01-02"),year("98-02-03"),dayofyear("1997-12-31");
month("1997-01-02")	year("98-02-03")	dayofyear("1997-12-31")
1	1998	365
select month("2001-02-00"),year("2001-00-00");
month("2001-02-00")	year("2001-00-00")
2	2001
select DAYOFYEAR("1997-03-03"), WEEK("1998-03-03"), QUARTER(980303);
DAYOFYEAR("1997-03-03")	WEEK("1998-03-03")	QUARTER(980303)
62	9	1
select HOUR("1997-03-03 23:03:22"), MINUTE("23:03:22"), SECOND(230322);
HOUR("1997-03-03 23:03:22")	MINUTE("23:03:22")	SECOND(230322)
23	3	22
select TIME(230322), TIME(230322.33), TIME("230322.33");
TIME(230322)	TIME(230322.33)	TIME("230322.33")
23:03:22	23:03:22.33	23:03:22.330000
select week(19980101),week(19970101),week(19980101,1),week(19970101,1);
week(19980101)	week(19970101)	week(19980101,1)	week(19970101,1)
0	0	1	1
select week(19981231),week(19971231),week(19981231,1),week(19971231,1);
week(19981231)	week(19971231)	week(19981231,1)	week(19971231,1)
52	52	53	53
select week(19950101),week(19950101,1);
week(19950101)	week(19950101,1)
1	0
select yearweek('1981-12-31',1),yearweek('1982-01-01',1),yearweek('1982-12-31',1),yearweek('1983-01-01',1);
yearweek('1981-12-31',1)	yearweek('1982-01-01',1)	yearweek('1982-12-31',1)	yearweek('1983-01-01',1)
198153	198153	198252	198252
select yearweek('1987-01-01',1),yearweek('1987-01-01');
yearweek('1987-01-01',1)	yearweek('1987-01-01')
198701	198652
select week("2000-01-01",0) as '2000', week("2001-01-01",0) as '2001', week("2002-01-01",0) as '2002',week("2003-01-01",0) as '2003', week("2004-01-01",0) as '2004', week("2005-01-01",0) as '2005', week("2006-01-01",0) as '2006';
2000	2001	2002	2003	2004	2005	2006
0	0	0	0	0	0	1
select week("2000-01-06",0) as '2000', week("2001-01-06",0) as '2001', week("2002-01-06",0) as '2002',week("2003-01-06",0) as '2003', week("2004-01-06",0) as '2004', week("2005-01-06",0) as '2005', week("2006-01-06",0) as '2006';
2000	2001	2002	2003	2004	2005	2006
1	0	1	1	1	1	1
select week("2000-01-01",1) as '2000', week("2001-01-01",1) as '2001', week("2002-01-01",1) as '2002',week("2003-01-01",1) as '2003', week("2004-01-01",1) as '2004', week("2005-01-01",1) as '2005', week("2006-01-01",1) as '2006';
2000	2001	2002	2003	2004	2005	2006
0	1	1	1	1	0	0
select week("2000-01-06",1) as '2000', week("2001-01-06",1) as '2001', week("2002-01-06",1) as '2002',week("2003-01-06",1) as '2003', week("2004-01-06",1) as '2004', week("2005-01-06",1) as '2005', week("2006-01-06",1) as '2006';
2000	2001	2002	2003	2004	2005	2006
1	1	1	2	2	1	1
select yearweek("2000-01-01",0) as '2000', yearweek("2001-01-01",0) as '2001', yearweek("2002-01-01",0) as '2002',yearweek("2003-01-01",0) as '2003', yearweek("2004-01-01",0) as '2004', yearweek("2005-01-01",0) as '2005', yearweek("2006-01-01",0) as '2006';
2000	2001	2002	2003	2004	2005	2006
199952	200053	200152	200252	200352	200452	200601
select yearweek("2000-01-06",0) as '2000', yearweek("2001-01-06",0) as '2001', yearweek("2002-01-06",0) as '2002',yearweek("2003-01-06",0) as '2003', yearweek("2004-01-06",0) as '2004', yearweek("2005-01-06",0) as '2005', yearweek("2006-01-06",0) as '2006';
2000	2001	2002	2003	2004	2005	2006
200001	200053	200201	200301	200401	200501	200601
select yearweek("2000-01-01",1) as '2000', yearweek("2001-01-01",1) as '2001', yearweek("2002-01-01",1) as '2002',yearweek("2003-01-01",1) as '2003', yearweek("2004-01-01",1) as '2004', yearweek("2005-01-01",1) as '2005', yearweek("2006-01-01",1) as '2006';
2000	2001	2002	2003	2004	2005	2006
199952	200101	200201	200301	200401	200453	200552
select yearweek("2000-01-06",1) as '2000', yearweek("2001-01-06",1) as '2001', yearweek("2002-01-06",1) as '2002',yearweek("2003-01-06",1) as '2003', yearweek("2004-01-06",1) as '2004', yearweek("2005-01-06",1) as '2005', yearweek("2006-01-06",1) as '2006';
2000	2001	2002	2003	2004	2005	2006
200001	200101	200201	200302	200402	200501	200601
select week(19981231,2), week(19981231,3), week(20000101,2), week(20000101,3);
week(19981231,2)	week(19981231,3)	week(20000101,2)	week(20000101,3)
52	53	52	52
select week(20001231,2),week(20001231,3);
week(20001231,2)	week(20001231,3)
53	52
select week(19981231,0) as '0', week(19981231,1) as '1', week(19981231,2) as '2', week(19981231,3) as '3', week(19981231,4) as '4', week(19981231,5) as '5', week(19981231,6) as '6', week(19981231,7) as '7';
0	1	2	3	4	5	6	7
52	53	52	53	52	52	52	52
select week(20000101,0) as '0', week(20000101,1) as '1', week(20000101,2) as '2', week(20000101,3) as '3', week(20000101,4) as '4', week(20000101,5) as '5', week(20000101,6) as '6', week(20000101,7) as '7';
0	1	2	3	4	5	6	7
0	0	52	52	0	0	52	52
select week(20000106,0) as '0', week(20000106,1) as '1', week(20000106,2) as '2', week(20000106,3) as '3', week(20000106,4) as '4', week(20000106,5) as '5', week(20000106,6) as '6', week(20000106,7) as '7';
0	1	2	3	4	5	6	7
1	1	1	1	1	1	1	1
select week(20001231,0) as '0', week(20001231,1) as '1', week(20001231,2) as '2', week(20001231,3) as '3', week(20001231,4) as '4', week(20001231,5) as '5', week(20001231,6) as '6', week(20001231,7) as '7';
0	1	2	3	4	5	6	7
53	52	53	52	53	52	1	52
select week(20010101,0) as '0', week(20010101,1) as '1', week(20010101,2) as '2', week(20010101,3) as '3', week(20010101,4) as '4', week(20010101,5) as '5', week(20010101,6) as '6', week(20010101,7) as '7';
0	1	2	3	4	5	6	7
0	1	53	1	1	1	1	1
select yearweek(20001231,0), yearweek(20001231,1), yearweek(20001231,2), yearweek(20001231,3), yearweek(20001231,4), yearweek(20001231,5), yearweek(20001231,6), yearweek(20001231,7);
yearweek(20001231,0)	yearweek(20001231,1)	yearweek(20001231,2)	yearweek(20001231,3)	yearweek(20001231,4)	yearweek(20001231,5)	yearweek(20001231,6)	yearweek(20001231,7)
200053	200052	200053	200052	200101	200052	200101	200052
set default_week_format = 6;
select week(20001231), week(20001231,6);
week(20001231)	week(20001231,6)
1	1
set default_week_format = 0;
set default_week_format = 2;
select week(20001231),week(20001231,2),week(20001231,0);
week(20001231)	week(20001231,2)	week(20001231,0)
53	53	53
set default_week_format = 0;
select date_format('1998-12-31','%x-%v'),date_format('1999-01-01','%x-%v');
date_format('1998-12-31','%x-%v')	date_format('1999-01-01','%x-%v')
1998-53	1998-53
select date_format('1999-12-31','%x-%v'),date_format('2000-01-01','%x-%v');
date_format('1999-12-31','%x-%v')	date_format('2000-01-01','%x-%v')
1999-52	1999-52
select dayname("1962-03-03"),dayname("1962-03-03")+0;
dayname("1962-03-03")	dayname("1962-03-03")+0
Saturday	5
select monthname("1972-03-04"),monthname("1972-03-04")+0;
monthname("1972-03-04")	monthname("1972-03-04")+0
March	0
select time_format(000000,'%H|%I|%k|%l|%i|%p|%r|%S|%T'),date_format(19980131000000,'%H|%I|%k|%l|%i|%p|%r|%S|%T');
time_format(000000,'%H|%I|%k|%l|%i|%p|%r|%S|%T')	date_format(19980131000000,'%H|%I|%k|%l|%i|%p|%r|%S|%T')
00|12|0|12|00|AM|12:00:00 AM|00|00:00:00	00|12|0|12|00|AM|12:00:00 AM|00|00:00:00
select time_format(010203,'%H|%I|%k|%l|%i|%p|%r|%S|%T'),date_format(19980131010203,'%H|%I|%k|%l|%i|%p|%r|%S|%T');
time_format(010203,'%H|%I|%k|%l|%i|%p|%r|%S|%T')	date_format(19980131010203,'%H|%I|%k|%l|%i|%p|%r|%S|%T')
01|01|1|1|02|AM|01:02:03 AM|03|01:02:03	01|01|1|1|02|AM|01:02:03 AM|03|01:02:03
select time_format(131415,'%H|%I|%k|%l|%i|%p|%r|%S|%T'),date_format(19980131131415,'%H|%I|%k|%l|%i|%p|%r|%S|%T');
time_format(131415,'%H|%I|%k|%l|%i|%p|%r|%S|%T')	date_format(19980131131415,'%H|%I|%k|%l|%i|%p|%r|%S|%T')
13|01|13|1|14|PM|01:14:15 PM|15|13:14:15	13|01|13|1|14|PM|01:14:15 PM|15|13:14:15
select time_format(010015,'%H|%I|%k|%l|%i|%p|%r|%S|%T'),date_format(19980131010015,'%H|%I|%k|%l|%i|%p|%r|%S|%T');
time_format(010015,'%H|%I|%k|%l|%i|%p|%r|%S|%T')	date_format(19980131010015,'%H|%I|%k|%l|%i|%p|%r|%S|%T')
01|01|1|1|00|AM|01:00:15 AM|15|01:00:15	01|01|1|1|00|AM|01:00:15 AM|15|01:00:15
select date_format(concat('19980131',131415),'%H|%I|%k|%l|%i|%p|%r|%S|%T| %M|%W|%D|%Y|%y|%a|%b|%j|%m|%d|%h|%s|%w');
date_format(concat('19980131',131415),'%H|%I|%k|%l|%i|%p|%r|%S|%T| %M|%W|%D|%Y|%y|%a|%b|%j|%m|%d|%h|%s|%w')
13|01|13|1|14|PM|01:14:15 PM|15|13:14:15| January|Saturday|31st|1998|98|Sat|Jan|031|01|31|01|15|6
select date_format(19980021000000,'%H|%I|%k|%l|%i|%p|%r|%S|%T| %M|%W|%D|%Y|%y|%a|%b|%j|%m|%d|%h|%s|%w');
date_format(19980021000000,'%H|%I|%k|%l|%i|%p|%r|%S|%T| %M|%W|%D|%Y|%y|%a|%b|%j|%m|%d|%h|%s|%w')
NULL
select date_add("1997-12-31 23:59:59",INTERVAL 1 SECOND);
date_add("1997-12-31 23:59:59",INTERVAL 1 SECOND)
1998-01-01 00:00:00
select date_add("1997-12-31 23:59:59",INTERVAL 1 MINUTE);
date_add("1997-12-31 23:59:59",INTERVAL 1 MINUTE)
1998-01-01 00:00:59
select date_add("1997-12-31 23:59:59",INTERVAL 1 HOUR);
date_add("1997-12-31 23:59:59",INTERVAL 1 HOUR)
1998-01-01 00:59:59
select date_add("1997-12-31 23:59:59",INTERVAL 1 DAY);
date_add("1997-12-31 23:59:59",INTERVAL 1 DAY)
1998-01-01 23:59:59
select date_add("1997-12-31 23:59:59",INTERVAL 1 MONTH);
date_add("1997-12-31 23:59:59",INTERVAL 1 MONTH)
1998-01-31 23:59:59
select date_add("1997-12-31 23:59:59",INTERVAL 1 YEAR);
date_add("1997-12-31 23:59:59",INTERVAL 1 YEAR)
1998-12-31 23:59:59
select date_add("1997-12-31 23:59:59",INTERVAL "1:1" MINUTE_SECOND);
date_add("1997-12-31 23:59:59",INTERVAL "1:1" MINUTE_SECOND)
1998-01-01 00:01:00
select date_add("1997-12-31 23:59:59",INTERVAL "1:1" HOUR_MINUTE);
date_add("1997-12-31 23:59:59",INTERVAL "1:1" HOUR_MINUTE)
1998-01-01 01:00:59
select date_add("1997-12-31 23:59:59",INTERVAL "1:1" DAY_HOUR);
date_add("1997-12-31 23:59:59",INTERVAL "1:1" DAY_HOUR)
1998-01-02 00:59:59
select date_add("1997-12-31 23:59:59",INTERVAL "1 1" YEAR_MONTH);
date_add("1997-12-31 23:59:59",INTERVAL "1 1" YEAR_MONTH)
1999-01-31 23:59:59
select date_add("1997-12-31 23:59:59",INTERVAL "1:1:1" HOUR_SECOND);
date_add("1997-12-31 23:59:59",INTERVAL "1:1:1" HOUR_SECOND)
1998-01-01 01:01:00
select date_add("1997-12-31 23:59:59",INTERVAL "1 1:1" DAY_MINUTE);
date_add("1997-12-31 23:59:59",INTERVAL "1 1:1" DAY_MINUTE)
1998-01-02 01:00:59
select date_add("1997-12-31 23:59:59",INTERVAL "1 1:1:1" DAY_SECOND);
date_add("1997-12-31 23:59:59",INTERVAL "1 1:1:1" DAY_SECOND)
1998-01-02 01:01:00
select date_sub("1998-01-01 00:00:00",INTERVAL 1 SECOND);
date_sub("1998-01-01 00:00:00",INTERVAL 1 SECOND)
1997-12-31 23:59:59
select date_sub("1998-01-01 00:00:00",INTERVAL 1 MINUTE);
date_sub("1998-01-01 00:00:00",INTERVAL 1 MINUTE)
1997-12-31 23:59:00
select date_sub("1998-01-01 00:00:00",INTERVAL 1 HOUR);
date_sub("1998-01-01 00:00:00",INTERVAL 1 HOUR)
1997-12-31 23:00:00
select date_sub("1998-01-01 00:00:00",INTERVAL 1 DAY);
date_sub("1998-01-01 00:00:00",INTERVAL 1 DAY)
1997-12-31 00:00:00
select date_sub("1998-01-01 00:00:00",INTERVAL 1 MONTH);
date_sub("1998-01-01 00:00:00",INTERVAL 1 MONTH)
1997-12-01 00:00:00
select date_sub("1998-01-01 00:00:00",INTERVAL 1 YEAR);
date_sub("1998-01-01 00:00:00",INTERVAL 1 YEAR)
1997-01-01 00:00:00
select date_sub("1998-01-01 00:00:00",INTERVAL "1:1" MINUTE_SECOND);
date_sub("1998-01-01 00:00:00",INTERVAL "1:1" MINUTE_SECOND)
1997-12-31 23:58:59
select date_sub("1998-01-01 00:00:00",INTERVAL "1:1" HOUR_MINUTE);
date_sub("1998-01-01 00:00:00",INTERVAL "1:1" HOUR_MINUTE)
1997-12-31 22:59:00
select date_sub("1998-01-01 00:00:00",INTERVAL "1:1" DAY_HOUR);
date_sub("1998-01-01 00:00:00",INTERVAL "1:1" DAY_HOUR)
1997-12-30 23:00:00
select date_sub("1998-01-01 00:00:00",INTERVAL "1 1" YEAR_MONTH);
date_sub("1998-01-01 00:00:00",INTERVAL "1 1" YEAR_MONTH)
1996-12-01 00:00:00
select date_sub("1998-01-01 00:00:00",INTERVAL "1:1:1" HOUR_SECOND);
date_sub("1998-01-01 00:00:00",INTERVAL "1:1:1" HOUR_SECOND)
1997-12-31 22:58:59
select date_sub("1998-01-01 00:00:00",INTERVAL "1 1:1" DAY_MINUTE);
date_sub("1998-01-01 00:00:00",INTERVAL "1 1:1" DAY_MINUTE)
1997-12-30 22:59:00
select date_sub("1998-01-01 00:00:00",INTERVAL "1 1:1:1" DAY_SECOND);
date_sub("1998-01-01 00:00:00",INTERVAL "1 1:1:1" DAY_SECOND)
1997-12-30 22:58:59
select date_add("1997-12-31 23:59:59",INTERVAL 100000 SECOND);
date_add("1997-12-31 23:59:59",INTERVAL 100000 SECOND)
1998-01-02 03:46:39
select date_add("1997-12-31 23:59:59",INTERVAL -100000 MINUTE);
date_add("1997-12-31 23:59:59",INTERVAL -100000 MINUTE)
1997-10-23 13:19:59
select date_add("1997-12-31 23:59:59",INTERVAL 100000 HOUR);
date_add("1997-12-31 23:59:59",INTERVAL 100000 HOUR)
2009-05-29 15:59:59
select date_add("1997-12-31 23:59:59",INTERVAL -100000 DAY);
date_add("1997-12-31 23:59:59",INTERVAL -100000 DAY)
1724-03-17 23:59:59
select date_add("1997-12-31 23:59:59",INTERVAL 100000 MONTH);
date_add("1997-12-31 23:59:59",INTERVAL 100000 MONTH)
NULL
Warnings:
Warning	1441	Datetime function: datetime field overflow
select date_add("1997-12-31 23:59:59",INTERVAL -100000 YEAR);
date_add("1997-12-31 23:59:59",INTERVAL -100000 YEAR)
NULL
Warnings:
Warning	1441	Datetime function: datetime field overflow
select date_add("1997-12-31 23:59:59",INTERVAL "10000:1" MINUTE_SECOND);
date_add("1997-12-31 23:59:59",INTERVAL "10000:1" MINUTE_SECOND)
1998-01-07 22:40:00
select date_add("1997-12-31 23:59:59",INTERVAL "-10000:1" HOUR_MINUTE);
date_add("1997-12-31 23:59:59",INTERVAL "-10000:1" HOUR_MINUTE)
1996-11-10 07:58:59
select date_add("1997-12-31 23:59:59",INTERVAL "10000:1" DAY_HOUR);
date_add("1997-12-31 23:59:59",INTERVAL "10000:1" DAY_HOUR)
2025-05-19 00:59:59
select date_add("1997-12-31 23:59:59",INTERVAL "-100 1" YEAR_MONTH);
date_add("1997-12-31 23:59:59",INTERVAL "-100 1" YEAR_MONTH)
1897-11-30 23:59:59
select date_add("1997-12-31 23:59:59",INTERVAL "10000:99:99" HOUR_SECOND);
date_add("1997-12-31 23:59:59",INTERVAL "10000:99:99" HOUR_SECOND)
1999-02-21 17:40:38
select date_add("1997-12-31 23:59:59",INTERVAL " -10000 99:99" DAY_MINUTE);
date_add("1997-12-31 23:59:59",INTERVAL " -10000 99:99" DAY_MINUTE)
1970-08-11 19:20:59
select date_add("1997-12-31 23:59:59",INTERVAL "10000 99:99:99" DAY_SECOND);
date_add("1997-12-31 23:59:59",INTERVAL "10000 99:99:99" DAY_SECOND)
2025-05-23 04:40:38
select "1997-12-31 23:59:59" + INTERVAL 1 SECOND;
"1997-12-31 23:59:59" + INTERVAL 1 SECOND
1998-01-01 00:00:00
select INTERVAL 1 DAY + "1997-12-31";
INTERVAL 1 DAY + "1997-12-31"
1998-01-01
select "1998-01-01 00:00:00" - INTERVAL 1 SECOND;
"1998-01-01 00:00:00" - INTERVAL 1 SECOND
1997-12-31 23:59:59
select date_sub("1998-01-02",INTERVAL 31 DAY);
date_sub("1998-01-02",INTERVAL 31 DAY)
1997-12-02
select date_add("1997-12-31",INTERVAL 1 SECOND);
date_add("1997-12-31",INTERVAL 1 SECOND)
1997-12-31 00:00:01
select date_add("1997-12-31",INTERVAL 1 DAY);
date_add("1997-12-31",INTERVAL 1 DAY)
1998-01-01
select date_add(NULL,INTERVAL 100000 SECOND);
date_add(NULL,INTERVAL 100000 SECOND)
NULL
select date_add("1997-12-31 23:59:59",INTERVAL NULL SECOND);
date_add("1997-12-31 23:59:59",INTERVAL NULL SECOND)
NULL
select date_add("1997-12-31 23:59:59",INTERVAL NULL MINUTE_SECOND);
date_add("1997-12-31 23:59:59",INTERVAL NULL MINUTE_SECOND)
NULL
select date_add("9999-12-31 23:59:59",INTERVAL 1 SECOND);
date_add("9999-12-31 23:59:59",INTERVAL 1 SECOND)
NULL
Warnings:
Warning	1441	Datetime function: datetime field overflow
select date_sub("0000-00-00 00:00:00",INTERVAL 1 SECOND);
date_sub("0000-00-00 00:00:00",INTERVAL 1 SECOND)
NULL
Warnings:
Warning	1292	Incorrect datetime value: '0000-00-00 00:00:00'
select date_add('1998-01-30',Interval 1 month);
date_add('1998-01-30',Interval 1 month)
1998-02-28
select date_add('1998-01-30',Interval '2:1' year_month);
date_add('1998-01-30',Interval '2:1' year_month)
2000-02-29
select date_add('1996-02-29',Interval '1' year);
date_add('1996-02-29',Interval '1' year)
1997-02-28
select extract(YEAR FROM "1999-01-02 10:11:12");
extract(YEAR FROM "1999-01-02 10:11:12")
1999
select extract(YEAR_MONTH FROM "1999-01-02");
extract(YEAR_MONTH FROM "1999-01-02")
199901
select extract(DAY FROM "1999-01-02");
extract(DAY FROM "1999-01-02")
2
select extract(DAY_HOUR FROM "1999-01-02 10:11:12");
extract(DAY_HOUR FROM "1999-01-02 10:11:12")
210
select extract(DAY_MINUTE FROM "02 10:11:12");
extract(DAY_MINUTE FROM "02 10:11:12")
21011
select extract(DAY_SECOND FROM "225 10:11:12");
extract(DAY_SECOND FROM "225 10:11:12")
8385959
Warnings:
Warning	1292	Truncated incorrect time value: '225 10:11:12'
select extract(HOUR FROM "1999-01-02 10:11:12");
extract(HOUR FROM "1999-01-02 10:11:12")
10
select extract(HOUR_MINUTE FROM "10:11:12");
extract(HOUR_MINUTE FROM "10:11:12")
1011
select extract(HOUR_SECOND FROM "10:11:12");
extract(HOUR_SECOND FROM "10:11:12")
101112
select extract(MINUTE FROM "10:11:12");
extract(MINUTE FROM "10:11:12")
11
select extract(MINUTE_SECOND FROM "10:11:12");
extract(MINUTE_SECOND FROM "10:11:12")
1112
select extract(SECOND FROM "1999-01-02 10:11:12");
extract(SECOND FROM "1999-01-02 10:11:12")
12
select extract(MONTH FROM "2001-02-00");
extract(MONTH FROM "2001-02-00")
2
SELECT EXTRACT(QUARTER FROM '2004-01-15') AS quarter;
quarter
1
SELECT EXTRACT(QUARTER FROM '2004-02-15') AS quarter;
quarter
1
SELECT EXTRACT(QUARTER FROM '2004-03-15') AS quarter;
quarter
1
SELECT EXTRACT(QUARTER FROM '2004-04-15') AS quarter;
quarter
2
SELECT EXTRACT(QUARTER FROM '2004-05-15') AS quarter;
quarter
2
SELECT EXTRACT(QUARTER FROM '2004-06-15') AS quarter;
quarter
2
SELECT EXTRACT(QUARTER FROM '2004-07-15') AS quarter;
quarter
3
SELECT EXTRACT(QUARTER FROM '2004-08-15') AS quarter;
quarter
3
SELECT EXTRACT(QUARTER FROM '2004-09-15') AS quarter;
quarter
3
SELECT EXTRACT(QUARTER FROM '2004-10-15') AS quarter;
quarter
4
SELECT EXTRACT(QUARTER FROM '2004-11-15') AS quarter;
quarter
4
SELECT EXTRACT(QUARTER FROM '2004-12-15') AS quarter;
quarter
4
SELECT DATE_SUB(str_to_date('9999-12-31 00:01:00','%Y-%m-%d %H:%i:%s'), INTERVAL 1 MINUTE);
DATE_SUB(str_to_date('9999-12-31 00:01:00','%Y-%m-%d %H:%i:%s'), INTERVAL 1 MINUTE)
9999-12-31 00:00:00
SELECT DATE_ADD(str_to_date('9999-12-30 23:59:00','%Y-%m-%d %H:%i:%s'), INTERVAL 1 MINUTE);
DATE_ADD(str_to_date('9999-12-30 23:59:00','%Y-%m-%d %H:%i:%s'), INTERVAL 1 MINUTE)
9999-12-31 00:00:00
SELECT "1900-01-01 00:00:00" + INTERVAL 2147483648 SECOND;
"1900-01-01 00:00:00" + INTERVAL 2147483648 SECOND
1968-01-20 03:14:08
SELECT "1900-01-01 00:00:00" + INTERVAL "1:2147483647" MINUTE_SECOND;
"1900-01-01 00:00:00" + INTERVAL "1:2147483647" MINUTE_SECOND
1968-01-20 03:15:07
SELECT "1900-01-01 00:00:00" + INTERVAL "100000000:214748364700" MINUTE_SECOND;
"1900-01-01 00:00:00" + INTERVAL "100000000:214748364700" MINUTE_SECOND
8895-03-27 22:11:40
SELECT "1900-01-01 00:00:00" + INTERVAL 1<<37 SECOND;
"1900-01-01 00:00:00" + INTERVAL 1<<37 SECOND
6255-04-08 15:04:32
SELECT "1900-01-01 00:00:00" + INTERVAL 1<<31 MINUTE;
"1900-01-01 00:00:00" + INTERVAL 1<<31 MINUTE
5983-01-24 02:08:00
SELECT "1900-01-01 00:00:00" + INTERVAL 1<<20 HOUR;
"1900-01-01 00:00:00" + INTERVAL 1<<20 HOUR
2019-08-15 16:00:00
SELECT "1900-01-01 00:00:00" + INTERVAL 1<<38 SECOND;
"1900-01-01 00:00:00" + INTERVAL 1<<38 SECOND
NULL
Warnings:
Warning	1441	Datetime function: datetime field overflow
SELECT "1900-01-01 00:00:00" + INTERVAL 1<<33 MINUTE;
"1900-01-01 00:00:00" + INTERVAL 1<<33 MINUTE
NULL
Warnings:
Warning	1441	Datetime function: datetime field overflow
SELECT "1900-01-01 00:00:00" + INTERVAL 1<<30 HOUR;
"1900-01-01 00:00:00" + INTERVAL 1<<30 HOUR
NULL
Warnings:
Warning	1441	Datetime function: datetime field overflow
SELECT "1900-01-01 00:00:00" + INTERVAL "1000000000:214748364700" MINUTE_SECOND;
"1900-01-01 00:00:00" + INTERVAL "1000000000:214748364700" MINUTE_SECOND
NULL
Warnings:
Warning	1441	Datetime function: datetime field overflow
create table t1 (ctime varchar(20));
insert into t1 values ('2001-01-12 12:23:40');
select ctime, hour(ctime) from t1;
ctime	hour(ctime)
2001-01-12 12:23:40	12
select ctime from t1 where extract(MONTH FROM ctime) = 1 AND extract(YEAR FROM ctime) = 2001;
ctime
2001-01-12 12:23:40
drop table t1;
create table t1 (id int);
create table t2 (id int, date date);
insert into t1 values (1);
insert into t2 values (1, "0000-00-00");
insert into t1 values (2);
insert into t2 values (2, "2000-01-01");
select monthname(date) from t1 inner join t2 on t1.id = t2.id;
monthname(date)
NULL
January
select monthname(date) from t1 inner join t2 on t1.id = t2.id order by t1.id;
monthname(date)
NULL
January
drop table t1,t2;
CREATE TABLE t1 (updated text) ENGINE=MyISAM;
INSERT INTO t1 VALUES ('');
SELECT month(updated) from t1;
month(updated)
NULL
Warnings:
Warning	1292	Incorrect datetime value: ''
SELECT year(updated) from t1;
year(updated)
NULL
Warnings:
Warning	1292	Incorrect datetime value: ''
drop table t1;
create table t1 (d date, dt datetime, t timestamp, c char(10));
insert into t1 values ("0000-00-00", "0000-00-00", "0000-00-00", "0000-00-00");
select dayofyear("0000-00-00"),dayofyear(d),dayofyear(dt),dayofyear(t),dayofyear(c) from t1;
dayofyear("0000-00-00")	dayofyear(d)	dayofyear(dt)	dayofyear(t)	dayofyear(c)
NULL	NULL	NULL	NULL	NULL
Warnings:
Warning	1292	Incorrect datetime value: '0000-00-00'
Warning	1292	Incorrect datetime value: '0000-00-00'
select dayofmonth("0000-00-00"),dayofmonth(d),dayofmonth(dt),dayofmonth(t),dayofmonth(c) from t1;
dayofmonth("0000-00-00")	dayofmonth(d)	dayofmonth(dt)	dayofmonth(t)	dayofmonth(c)
0	0	0	0	0
select month("0000-00-00"),month(d),month(dt),month(t),month(c) from t1;
month("0000-00-00")	month(d)	month(dt)	month(t)	month(c)
0	0	0	0	0
select quarter("0000-00-00"),quarter(d),quarter(dt),quarter(t),quarter(c) from t1;
quarter("0000-00-00")	quarter(d)	quarter(dt)	quarter(t)	quarter(c)
0	0	0	0	0
select week("0000-00-00"),week(d),week(dt),week(t),week(c) from t1;
week("0000-00-00")	week(d)	week(dt)	week(t)	week(c)
NULL	NULL	NULL	NULL	NULL
Warnings:
Warning	1292	Incorrect datetime value: '0000-00-00'
Warning	1292	Incorrect datetime value: '0000-00-00'
select year("0000-00-00"),year(d),year(dt),year(t),year(c) from t1;
year("0000-00-00")	year(d)	year(dt)	year(t)	year(c)
0	0	0	0	0
select yearweek("0000-00-00"),yearweek(d),yearweek(dt),yearweek(t),yearweek(c) from t1;
yearweek("0000-00-00")	yearweek(d)	yearweek(dt)	yearweek(t)	yearweek(c)
NULL	NULL	NULL	NULL	NULL
Warnings:
Warning	1292	Incorrect datetime value: '0000-00-00'
Warning	1292	Incorrect datetime value: '0000-00-00'
select to_days("0000-00-00"),to_days(d),to_days(dt),to_days(t),to_days(c) from t1;
to_days("0000-00-00")	to_days(d)	to_days(dt)	to_days(t)	to_days(c)
NULL	NULL	NULL	NULL	NULL
Warnings:
Warning	1292	Incorrect datetime value: '0000-00-00'
Warning	1292	Incorrect datetime value: '0000-00-00'
select extract(MONTH FROM "0000-00-00"),extract(MONTH FROM d),extract(MONTH FROM dt),extract(MONTH FROM t),extract(MONTH FROM c) from t1;
extract(MONTH FROM "0000-00-00")	extract(MONTH FROM d)	extract(MONTH FROM dt)	extract(MONTH FROM t)	extract(MONTH FROM c)
0	0	0	0	0
drop table t1;
CREATE TABLE t1 ( start datetime default NULL);
INSERT INTO t1 VALUES ('2002-10-21 00:00:00'),('2002-10-28 00:00:00'),('2002-11-04 00:00:00');
CREATE TABLE t2 ( ctime1 timestamp NOT NULL, ctime2 timestamp NOT NULL);
INSERT INTO t2 VALUES (20021029165106,20021105164731);
CREATE TABLE t3 (ctime1 char(19) NOT NULL, ctime2 char(19) NOT NULL);
INSERT INTO t3 VALUES ("2002-10-29 16:51:06","2002-11-05 16:47:31");
select * from t1, t2 where t1.start between t2.ctime1 and t2.ctime2;
start	ctime1	ctime2
2002-11-04 00:00:00	2002-10-29 16:51:06	2002-11-05 16:47:31
select * from t1, t2 where t1.start >= t2.ctime1 and t1.start <= t2.ctime2;
start	ctime1	ctime2
2002-11-04 00:00:00	2002-10-29 16:51:06	2002-11-05 16:47:31
select * from t1, t3 where t1.start between t3.ctime1 and t3.ctime2;
start	ctime1	ctime2
2002-11-04 00:00:00	2002-10-29 16:51:06	2002-11-05 16:47:31
drop table t1,t2,t3;
select @a:=FROM_UNIXTIME(1);
@a:=FROM_UNIXTIME(1)
1970-01-01 03:00:01
select unix_timestamp(@a);
unix_timestamp(@a)
1.000000
select unix_timestamp('1969-12-01 19:00:01');
unix_timestamp('1969-12-01 19:00:01')
NULL
select from_unixtime(-1);
from_unixtime(-1)
NULL
select from_unixtime(2147483647);
from_unixtime(2147483647)
2038-01-19 06:14:07
select from_unixtime(2147483648);
from_unixtime(2147483648)
NULL
select from_unixtime(0);
from_unixtime(0)
1970-01-01 03:00:00
select unix_timestamp(from_unixtime(2147483647));
unix_timestamp(from_unixtime(2147483647))
2147483647
select unix_timestamp(from_unixtime(2147483648));
unix_timestamp(from_unixtime(2147483648))
NULL
select unix_timestamp('2039-01-20 01:00:00');
unix_timestamp('2039-01-20 01:00:00')
NULL
select unix_timestamp('1968-01-20 01:00:00');
unix_timestamp('1968-01-20 01:00:00')
NULL
select unix_timestamp('2038-02-10 01:00:00');
unix_timestamp('2038-02-10 01:00:00')
NULL
select unix_timestamp('1969-11-20 01:00:00');
unix_timestamp('1969-11-20 01:00:00')
NULL
select unix_timestamp('2038-01-20 01:00:00');
unix_timestamp('2038-01-20 01:00:00')
NULL
select unix_timestamp('1969-12-30 01:00:00');
unix_timestamp('1969-12-30 01:00:00')
NULL
select unix_timestamp('2038-01-17 12:00:00');
unix_timestamp('2038-01-17 12:00:00')
2147331600.000000
select unix_timestamp('1970-01-01 03:00:01');
unix_timestamp('1970-01-01 03:00:01')
1.000000
select unix_timestamp('2038-01-19 07:14:07');
unix_timestamp('2038-01-19 07:14:07')
NULL
SELECT CHARSET(DAYNAME(19700101));
CHARSET(DAYNAME(19700101))
latin1
SELECT CHARSET(MONTHNAME(19700101));
CHARSET(MONTHNAME(19700101))
latin1
SELECT LOWER(DAYNAME(19700101));
LOWER(DAYNAME(19700101))
thursday
SELECT LOWER(MONTHNAME(19700101));
LOWER(MONTHNAME(19700101))
january
SELECT COERCIBILITY(MONTHNAME('1970-01-01')),COERCIBILITY(DAYNAME('1970-01-01'));
COERCIBILITY(MONTHNAME('1970-01-01'))	COERCIBILITY(DAYNAME('1970-01-01'))
4	4
CREATE TABLE t1 (datetime datetime, timestamp timestamp, date date, time time);
INSERT INTO t1 values ("2001-01-02 03:04:05", "2002-01-02 03:04:05", "2003-01-02", "06:07:08");
SELECT * from t1;
datetime	timestamp	date	time
2001-01-02 03:04:05	2002-01-02 03:04:05	2003-01-02	06:07:08
select date_add("1997-12-31",INTERVAL 1 SECOND);
date_add("1997-12-31",INTERVAL 1 SECOND)
1997-12-31 00:00:01
select date_add("1997-12-31",INTERVAL "1 1" YEAR_MONTH);
date_add("1997-12-31",INTERVAL "1 1" YEAR_MONTH)
1999-01-31
select date_add(datetime, INTERVAL 1 SECOND) from t1;
date_add(datetime, INTERVAL 1 SECOND)
2001-01-02 03:04:06
select date_add(datetime, INTERVAL 1 YEAR) from t1;
date_add(datetime, INTERVAL 1 YEAR)
2002-01-02 03:04:05
select date_add(date,INTERVAL 1 SECOND) from t1;
date_add(date,INTERVAL 1 SECOND)
2003-01-02 00:00:01
select date_add(date,INTERVAL 1 MINUTE) from t1;
date_add(date,INTERVAL 1 MINUTE)
2003-01-02 00:01:00
select date_add(date,INTERVAL 1 HOUR) from t1;
date_add(date,INTERVAL 1 HOUR)
2003-01-02 01:00:00
select date_add(date,INTERVAL 1 DAY) from t1;
date_add(date,INTERVAL 1 DAY)
2003-01-03
select date_add(date,INTERVAL 1 MONTH) from t1;
date_add(date,INTERVAL 1 MONTH)
2003-02-02
select date_add(date,INTERVAL 1 YEAR) from t1;
date_add(date,INTERVAL 1 YEAR)
2004-01-02
select date_add(date,INTERVAL "1:1" MINUTE_SECOND) from t1;
date_add(date,INTERVAL "1:1" MINUTE_SECOND)
2003-01-02 00:01:01
select date_add(date,INTERVAL "1:1" HOUR_MINUTE) from t1;
date_add(date,INTERVAL "1:1" HOUR_MINUTE)
2003-01-02 01:01:00
select date_add(date,INTERVAL "1:1" DAY_HOUR) from t1;
date_add(date,INTERVAL "1:1" DAY_HOUR)
2003-01-03 01:00:00
select date_add(date,INTERVAL "1 1" YEAR_MONTH) from t1;
date_add(date,INTERVAL "1 1" YEAR_MONTH)
2004-02-02
select date_add(date,INTERVAL "1:1:1" HOUR_SECOND) from t1;
date_add(date,INTERVAL "1:1:1" HOUR_SECOND)
2003-01-02 01:01:01
select date_add(date,INTERVAL "1 1:1" DAY_MINUTE) from t1;
date_add(date,INTERVAL "1 1:1" DAY_MINUTE)
2003-01-03 01:01:00
select date_add(date,INTERVAL "1 1:1:1" DAY_SECOND) from t1;
date_add(date,INTERVAL "1 1:1:1" DAY_SECOND)
2003-01-03 01:01:01
select date_add(date,INTERVAL "1" WEEK) from t1;
date_add(date,INTERVAL "1" WEEK)
2003-01-09
select date_add(date,INTERVAL "1" QUARTER) from t1;
date_add(date,INTERVAL "1" QUARTER)
2003-04-02
select timestampadd(MINUTE, 1, date) from t1;
timestampadd(MINUTE, 1, date)
2003-01-02 00:01:00
select timestampadd(WEEK, 1, date) from t1;
timestampadd(WEEK, 1, date)
2003-01-09
select timestampadd(SQL_TSI_SECOND, 1, date) from t1;
timestampadd(SQL_TSI_SECOND, 1, date)
2003-01-02 00:00:01
select timestampdiff(MONTH, '2001-02-01', '2001-05-01') as a;
a
3
select timestampdiff(YEAR, '2002-05-01', '2001-01-01') as a;
a
-1
select timestampdiff(QUARTER, '2002-05-01', '2001-01-01') as a;
a
-5
select timestampdiff(MONTH, '2000-03-28', '2000-02-29') as a;
a
0
select timestampdiff(MONTH, '1991-03-28', '2000-02-29') as a;
a
107
select timestampdiff(SQL_TSI_WEEK, '2001-02-01', '2001-05-01') as a;
a
12
select timestampdiff(SQL_TSI_HOUR, '2001-02-01', '2001-05-01') as a;
a
2136
select timestampdiff(SQL_TSI_DAY, '2001-02-01', '2001-05-01') as a;
a
89
select timestampdiff(SQL_TSI_MINUTE, '2001-02-01 12:59:59', '2001-05-01 12:58:59') as a;
a
128159
select timestampdiff(SQL_TSI_SECOND, '2001-02-01 12:59:59', '2001-05-01 12:58:58') as a;
a
7689539
select timestampdiff(SQL_TSI_DAY, '1986-02-01', '1986-03-01') as a1,
timestampdiff(SQL_TSI_DAY, '1900-02-01', '1900-03-01') as a2,
timestampdiff(SQL_TSI_DAY, '1996-02-01', '1996-03-01') as a3,
timestampdiff(SQL_TSI_DAY, '2000-02-01', '2000-03-01') as a4;
a1	a2	a3	a4
28	28	29	29
SELECT TIMESTAMPDIFF(day,'2006-01-10 14:30:28','2006-01-11 14:30:27');
TIMESTAMPDIFF(day,'2006-01-10 14:30:28','2006-01-11 14:30:27')
0
SELECT TIMESTAMPDIFF(day,'2006-01-10 14:30:28','2006-01-11 14:30:28');
TIMESTAMPDIFF(day,'2006-01-10 14:30:28','2006-01-11 14:30:28')
1
SELECT TIMESTAMPDIFF(day,'2006-01-10 14:30:28','2006-01-11 14:30:29');
TIMESTAMPDIFF(day,'2006-01-10 14:30:28','2006-01-11 14:30:29')
1
SELECT TIMESTAMPDIFF(day,'2006-01-10 14:30:28','2006-01-12 14:30:27');
TIMESTAMPDIFF(day,'2006-01-10 14:30:28','2006-01-12 14:30:27')
1
SELECT TIMESTAMPDIFF(day,'2006-01-10 14:30:28','2006-01-12 14:30:28');
TIMESTAMPDIFF(day,'2006-01-10 14:30:28','2006-01-12 14:30:28')
2
SELECT TIMESTAMPDIFF(day,'2006-01-10 14:30:28','2006-01-12 14:30:29');
TIMESTAMPDIFF(day,'2006-01-10 14:30:28','2006-01-12 14:30:29')
2
SELECT TIMESTAMPDIFF(week,'2006-01-10 14:30:28','2006-01-17 14:30:27');
TIMESTAMPDIFF(week,'2006-01-10 14:30:28','2006-01-17 14:30:27')
0
SELECT TIMESTAMPDIFF(week,'2006-01-10 14:30:28','2006-01-17 14:30:28');
TIMESTAMPDIFF(week,'2006-01-10 14:30:28','2006-01-17 14:30:28')
1
SELECT TIMESTAMPDIFF(week,'2006-01-10 14:30:28','2006-01-17 14:30:29');
TIMESTAMPDIFF(week,'2006-01-10 14:30:28','2006-01-17 14:30:29')
1
SELECT TIMESTAMPDIFF(week,'2006-01-10 14:30:28','2006-01-24 14:30:27');
TIMESTAMPDIFF(week,'2006-01-10 14:30:28','2006-01-24 14:30:27')
1
SELECT TIMESTAMPDIFF(week,'2006-01-10 14:30:28','2006-01-24 14:30:28');
TIMESTAMPDIFF(week,'2006-01-10 14:30:28','2006-01-24 14:30:28')
2
SELECT TIMESTAMPDIFF(week,'2006-01-10 14:30:28','2006-01-24 14:30:29');
TIMESTAMPDIFF(week,'2006-01-10 14:30:28','2006-01-24 14:30:29')
2
SELECT TIMESTAMPDIFF(month,'2006-01-10 14:30:28','2006-02-10 14:30:27');
TIMESTAMPDIFF(month,'2006-01-10 14:30:28','2006-02-10 14:30:27')
0
SELECT TIMESTAMPDIFF(month,'2006-01-10 14:30:28','2006-02-10 14:30:28');
TIMESTAMPDIFF(month,'2006-01-10 14:30:28','2006-02-10 14:30:28')
1
SELECT TIMESTAMPDIFF(month,'2006-01-10 14:30:28','2006-02-10 14:30:29');
TIMESTAMPDIFF(month,'2006-01-10 14:30:28','2006-02-10 14:30:29')
1
SELECT TIMESTAMPDIFF(month,'2006-01-10 14:30:28','2006-03-10 14:30:27');
TIMESTAMPDIFF(month,'2006-01-10 14:30:28','2006-03-10 14:30:27')
1
SELECT TIMESTAMPDIFF(month,'2006-01-10 14:30:28','2006-03-10 14:30:28');
TIMESTAMPDIFF(month,'2006-01-10 14:30:28','2006-03-10 14:30:28')
2
SELECT TIMESTAMPDIFF(month,'2006-01-10 14:30:28','2006-03-10 14:30:29');
TIMESTAMPDIFF(month,'2006-01-10 14:30:28','2006-03-10 14:30:29')
2
SELECT TIMESTAMPDIFF(year,'2006-01-10 14:30:28','2007-01-10 14:30:27');
TIMESTAMPDIFF(year,'2006-01-10 14:30:28','2007-01-10 14:30:27')
0
SELECT TIMESTAMPDIFF(year,'2006-01-10 14:30:28','2007-01-10 14:30:28');
TIMESTAMPDIFF(year,'2006-01-10 14:30:28','2007-01-10 14:30:28')
1
SELECT TIMESTAMPDIFF(year,'2006-01-10 14:30:28','2007-01-10 14:30:29');
TIMESTAMPDIFF(year,'2006-01-10 14:30:28','2007-01-10 14:30:29')
1
SELECT TIMESTAMPDIFF(year,'2006-01-10 14:30:28','2008-01-10 14:30:27');
TIMESTAMPDIFF(year,'2006-01-10 14:30:28','2008-01-10 14:30:27')
1
SELECT TIMESTAMPDIFF(year,'2006-01-10 14:30:28','2008-01-10 14:30:28');
TIMESTAMPDIFF(year,'2006-01-10 14:30:28','2008-01-10 14:30:28')
2
SELECT TIMESTAMPDIFF(year,'2006-01-10 14:30:28','2008-01-10 14:30:29');
TIMESTAMPDIFF(year,'2006-01-10 14:30:28','2008-01-10 14:30:29')
2
select date_add(time,INTERVAL 1 SECOND) from t1;
date_add(time,INTERVAL 1 SECOND)
06:07:09
drop table t1;
select last_day('2000-02-05') as f1, last_day('2002-12-31') as f2,
last_day('2003-03-32') as f3, last_day('2003-04-01') as f4,
last_day('2001-01-01 01:01:01') as f5, last_day(NULL),
last_day('2001-02-12');
f1	f2	f3	f4	f5	last_day(NULL)	last_day('2001-02-12')
2000-02-29	2002-12-31	NULL	2003-04-30	2001-01-31	NULL	2001-02-28
Warnings:
Warning	1292	Incorrect datetime value: '2003-03-32'
create table t1 select last_day('2000-02-05') as a,
from_days(to_days("960101")) as b;
describe t1;
Field	Type	Null	Key	Default	Extra
a	date	YES		NULL	
b	date	YES		NULL	
select * from t1;
a	b
2000-02-29	1996-01-01
drop table t1;
select last_day('2000-02-05') as a,
from_days(to_days("960101")) as b;
a	b
2000-02-29	1996-01-01
select date_add(last_day("1997-12-1"), INTERVAL 1 DAY);
date_add(last_day("1997-12-1"), INTERVAL 1 DAY)
1998-01-01
select length(last_day("1997-12-1"));
length(last_day("1997-12-1"))
10
select last_day("1997-12-1")+0;
last_day("1997-12-1")+0
19971231
select last_day("1997-12-1")+0.0;
last_day("1997-12-1")+0.0
19971231.0
select strcmp(date_sub(localtimestamp(), interval 3 hour), utc_timestamp())=0;
strcmp(date_sub(localtimestamp(), interval 3 hour), utc_timestamp())=0
1
select strcmp(date_format(date_sub(localtimestamp(), interval 3 hour),"%T"), utc_time())=0;
strcmp(date_format(date_sub(localtimestamp(), interval 3 hour),"%T"), utc_time())=0
1
select strcmp(date_format(date_sub(localtimestamp(), interval 3 hour),"%Y-%m-%d"), utc_date())=0;
strcmp(date_format(date_sub(localtimestamp(), interval 3 hour),"%Y-%m-%d"), utc_date())=0
1
select strcmp(date_format(utc_timestamp(),"%T"), utc_time())=0;
strcmp(date_format(utc_timestamp(),"%T"), utc_time())=0
1
select strcmp(date_format(utc_timestamp(),"%Y-%m-%d"), utc_date())=0;
strcmp(date_format(utc_timestamp(),"%Y-%m-%d"), utc_date())=0
1
select strcmp(concat(utc_date(),' ',utc_time()),utc_timestamp())=0;
strcmp(concat(utc_date(),' ',utc_time()),utc_timestamp())=0
1
explain extended select period_add("9602",-12),period_diff(199505,"9404"),from_days(to_days("960101")),dayofmonth("1997-01-02"), month("1997-01-02"), monthname("1972-03-04"),dayofyear("0000-00-00"),HOUR("1997-03-03 23:03:22"),MINUTE("23:03:22"),SECOND(230322),QUARTER(980303),WEEK("1998-03-03"),yearweek("2000-01-01",1),week(19950101,1),year("98-02-03"),weekday(curdate())-weekday(now()),dayname("1962-03-03"),unix_timestamp(),sec_to_time(time_to_sec("0:30:47")/6.21),curtime(),utc_time(),curdate(),utc_date(),utc_timestamp(),date_format("1997-01-02 03:04:05", "%M %W %D %Y %y %m %d %h %i %s %w"),from_unixtime(unix_timestamp("1994-03-02 10:11:12")),"1997-12-31 23:59:59" + INTERVAL 1 SECOND,"1998-01-01 00:00:00" - INTERVAL 1 SECOND,INTERVAL 1 DAY + "1997-12-31", extract(YEAR FROM "1999-01-02 10:11:12"),date_add("1997-12-31 23:59:59",INTERVAL 1 SECOND);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
Warnings:
Note	1003	select period_add('9602',-(12)) AS `period_add("9602",-12)`,period_diff(199505,'9404') AS `period_diff(199505,"9404")`,from_days(to_days('960101')) AS `from_days(to_days("960101"))`,dayofmonth('1997-01-02') AS `dayofmonth("1997-01-02")`,month('1997-01-02') AS `month("1997-01-02")`,monthname('1972-03-04') AS `monthname("1972-03-04")`,dayofyear('0000-00-00') AS `dayofyear("0000-00-00")`,hour('1997-03-03 23:03:22') AS `HOUR("1997-03-03 23:03:22")`,minute('23:03:22') AS `MINUTE("23:03:22")`,second(230322) AS `SECOND(230322)`,quarter(980303) AS `QUARTER(980303)`,week('1998-03-03',0) AS `WEEK("1998-03-03")`,yearweek('2000-01-01',1) AS `yearweek("2000-01-01",1)`,week(19950101,1) AS `week(19950101,1)`,year('98-02-03') AS `year("98-02-03")`,(weekday(curdate()) - weekday(now())) AS `weekday(curdate())-weekday(now())`,dayname('1962-03-03') AS `dayname("1962-03-03")`,unix_timestamp() AS `unix_timestamp()`,sec_to_time((time_to_sec('0:30:47') / 6.21)) AS `sec_to_time(time_to_sec("0:30:47")/6.21)`,curtime() AS `curtime()`,utc_time() AS `utc_time()`,curdate() AS `curdate()`,utc_date() AS `utc_date()`,utc_timestamp() AS `utc_timestamp()`,date_format('1997-01-02 03:04:05','%M %W %D %Y %y %m %d %h %i %s %w') AS `date_format("1997-01-02 03:04:05", "%M %W %D %Y %y %m %d %h %i %s %w")`,from_unixtime(unix_timestamp('1994-03-02 10:11:12')) AS `from_unixtime(unix_timestamp("1994-03-02 10:11:12"))`,('1997-12-31 23:59:59' + interval 1 second) AS `"1997-12-31 23:59:59" + INTERVAL 1 SECOND`,('1998-01-01 00:00:00' - interval 1 second) AS `"1998-01-01 00:00:00" - INTERVAL 1 SECOND`,('1997-12-31' + interval 1 day) AS `INTERVAL 1 DAY + "1997-12-31"`,extract(year from '1999-01-02 10:11:12') AS `extract(YEAR FROM "1999-01-02 10:11:12")`,('1997-12-31 23:59:59' + interval 1 second) AS `date_add("1997-12-31 23:59:59",INTERVAL 1 SECOND)`
SET @TMP='2007-08-01 12:22:49';
CREATE TABLE t1 (d DATETIME);
INSERT INTO t1 VALUES ('2007-08-01 12:22:59');
INSERT INTO t1 VALUES ('2007-08-01 12:23:01');
INSERT INTO t1 VALUES ('2007-08-01 12:23:20');
SELECT count(*) FROM t1 WHERE d>FROM_DAYS(TO_DAYS(@TMP)) AND d<=FROM_DAYS(TO_DAYS(@TMP)+1);
count(*)
3
DROP TABLE t1;
select last_day('2005-00-00');
last_day('2005-00-00')
NULL
select last_day('2005-00-01');
last_day('2005-00-01')
NULL
select last_day('2005-01-00');
last_day('2005-01-00')
2005-01-31
select monthname(str_to_date(null, '%m')), monthname(str_to_date(null, '%m')),
monthname(str_to_date(1, '%m')), monthname(str_to_date(0, '%m'));
monthname(str_to_date(null, '%m'))	monthname(str_to_date(null, '%m'))	monthname(str_to_date(1, '%m'))	monthname(str_to_date(0, '%m'))
NULL	NULL	January	NULL
set time_zone='-6:00';
create table t1(a timestamp);
insert into t1 values (19691231190001);
select * from t1;
a
1969-12-31 19:00:01
drop table t1;
create table t1(f1 date, f2 time, f3 datetime);
insert into t1 values ("2006-01-01", "12:01:01", "2006-01-01 12:01:01");
insert into t1 values ("2006-01-02", "12:01:02", "2006-01-02 12:01:02");
select f1 from t1 where f1 between CAST("2006-1-1" as date) and CAST(20060101 as date);
f1
2006-01-01
select f1 from t1 where f1 between cast("2006-1-1" as date) and cast("2006.1.1" as date);
f1
2006-01-01
select f1 from t1 where date(f1) between cast("2006-1-1" as date) and cast("2006.1.1" as date);
f1
2006-01-01
select f2 from t1 where f2 between cast("12:1:2" as time) and cast("12:2:2" as time);
f2
12:01:02
select f2 from t1 where time(f2) between cast("12:1:2" as time) and cast("12:2:2" as time);
f2
12:01:02
select f3 from t1 where f3 between cast("2006-1-1 12:1:1" as datetime) and cast("2006-1-1 12:1:2" as datetime);
f3
2006-01-01 12:01:01
select f3 from t1 where timestamp(f3) between cast("2006-1-1 12:1:1" as datetime) and cast("2006-1-1 12:1:2" as datetime);
f3
2006-01-01 12:01:01
select f1 from t1 where cast("2006-1-1" as date) between f1 and f3;
f1
2006-01-01
select f1 from t1 where cast("2006-1-1" as date) between date(f1) and date(f3);
f1
2006-01-01
select f1 from t1 where cast("2006-1-1" as date) between f1 and cast('zzz' as date);
f1
Warnings:
Warning	1292	Incorrect datetime value: 'zzz'
select f1 from t1 where makedate(2006,1) between date(f1) and date(f3);
f1
2006-01-01
select f1 from t1 where makedate(2006,2) between date(f1) and date(f3);
f1
2006-01-02
drop table t1;
create table t1 select now() - now(), curtime() - curtime(), 
sec_to_time(1) + 0, from_unixtime(1) + 0;
show create table t1;
Table	Create Table
t1	CREATE TABLE `t1` (
  `now() - now()` decimal(20,0) NOT NULL DEFAULT '0',
  `curtime() - curtime()` decimal(11,0) NOT NULL DEFAULT '0',
  `sec_to_time(1) + 0` decimal(11,0) DEFAULT NULL,
  `from_unixtime(1) + 0` decimal(20,0) DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
drop table t1;
SELECT SEC_TO_TIME(3300000);
SEC_TO_TIME(3300000)
838:59:59
Warnings:
Warning	1292	Truncated incorrect time value: '3300000'
SELECT SEC_TO_TIME(3300000)+0;
SEC_TO_TIME(3300000)+0
8385959
Warnings:
Warning	1292	Truncated incorrect time value: '3300000'
SELECT SEC_TO_TIME(3600 * 4294967296);
SEC_TO_TIME(3600 * 4294967296)
838:59:59
Warnings:
Warning	1292	Truncated incorrect time value: '15461882265600'
SELECT TIME_TO_SEC('916:40:00');
TIME_TO_SEC('916:40:00')
3020399.999999
Warnings:
Warning	1292	Truncated incorrect time value: '916:40:00'
SELECT ADDTIME('500:00:00', '416:40:00');
ADDTIME('500:00:00', '416:40:00')
838:59:59.999999
Warnings:
Warning	1292	Truncated incorrect time value: '916:40:00'
SELECT ADDTIME('916:40:00', '416:40:00');
ADDTIME('916:40:00', '416:40:00')
838:59:59.999999
Warnings:
Warning	1292	Truncated incorrect time value: '916:40:00'
Warning	1292	Truncated incorrect time value: '1255:39:59.999999'
SELECT SUBTIME('916:40:00', '416:40:00');
SUBTIME('916:40:00', '416:40:00')
422:19:59.999999
Warnings:
Warning	1292	Truncated incorrect time value: '916:40:00'
SELECT SUBTIME('-916:40:00', '416:40:00');
SUBTIME('-916:40:00', '416:40:00')
-838:59:59.999999
Warnings:
Warning	1292	Truncated incorrect time value: '-916:40:00'
Warning	1292	Truncated incorrect time value: '-1255:39:59.999999'
SELECT MAKETIME(916,0,0);
MAKETIME(916,0,0)
838:59:59
Warnings:
Warning	1292	Truncated incorrect time value: '916:00:00'
SELECT MAKETIME(4294967296, 0, 0);
MAKETIME(4294967296, 0, 0)
838:59:59
Warnings:
Warning	1292	Truncated incorrect time value: '4294967296:00:00'
SELECT MAKETIME(-4294967296, 0, 0);
MAKETIME(-4294967296, 0, 0)
-838:59:59
Warnings:
Warning	1292	Truncated incorrect time value: '-4294967296:00:00'
SELECT MAKETIME(0, 4294967296, 0);
MAKETIME(0, 4294967296, 0)
NULL
SELECT MAKETIME(0, 0, 4294967296);
MAKETIME(0, 0, 4294967296)
NULL
SELECT MAKETIME(CAST(-1 AS UNSIGNED), 0, 0);
MAKETIME(CAST(-1 AS UNSIGNED), 0, 0)
838:59:59
Warnings:
Note	1105	Cast to unsigned converted negative integer to it's positive complement
Warning	1292	Truncated incorrect time value: '18446744073709551615:00:00'
SELECT EXTRACT(HOUR FROM '10000:02:03');
EXTRACT(HOUR FROM '10000:02:03')
838
Warnings:
Warning	1292	Truncated incorrect time value: '10000:02:03'
CREATE TABLE t1(f1 TIME);
INSERT INTO t1 VALUES('916:00:00 a');
Warnings:
Warning	1265	Data truncated for column 'f1' at row 1
Warning	1264	Out of range value for column 'f1' at row 1
SELECT * FROM t1;
f1
838:59:59
DROP TABLE t1;
SELECT SEC_TO_TIME(CAST(-1 AS UNSIGNED));
SEC_TO_TIME(CAST(-1 AS UNSIGNED))
838:59:59
Warnings:
Note	1105	Cast to unsigned converted negative integer to it's positive complement
Note	1105	Cast to unsigned converted negative integer to it's positive complement
Warning	1292	Truncated incorrect time value: '18446744073709551615'
SET NAMES latin1;
SET character_set_results = NULL;
SHOW VARIABLES LIKE 'character_set_results';
Variable_name	Value
character_set_results	
CREATE TABLE testBug8868 (field1 DATE, field2 VARCHAR(32) CHARACTER SET BINARY);
INSERT INTO testBug8868 VALUES ('2006-09-04', 'abcd');
SELECT DATE_FORMAT(field1,'%b-%e %l:%i%p') as fmtddate, field2 FROM testBug8868;
fmtddate	field2
Sep-4 12:00AM	abcd
DROP TABLE testBug8868;
SET NAMES DEFAULT;
CREATE TABLE t1 (
a TIMESTAMP
);
INSERT INTO t1 VALUES (now()), (now());
SELECT 1 FROM t1 ORDER BY MAKETIME(1, 1, a);
1
1
1
DROP TABLE t1;
(select time_format(timediff(now(), DATE_SUB(now(),INTERVAL 5 DAY)),'%H') As H)
union
(select time_format(timediff(now(), DATE_SUB(now(),INTERVAL 5 DAY)),'%H') As H);
H
120
(select time_format(timediff(now(), DATE_SUB(now(),INTERVAL 5 DAY)),'%k') As H)
union
(select time_format(timediff(now(), DATE_SUB(now(),INTERVAL 5 DAY)),'%k') As H);
H
120
(select time_format(timediff(now(), DATE_SUB(now(),INTERVAL 5 HOUR)),'%H') As H)
union
(select time_format(timediff(now(), DATE_SUB(now(),INTERVAL 5 HOUR)),'%H') As H);
H
05
(select time_format(timediff(now(), DATE_SUB(now(),INTERVAL 5 HOUR)),'%k') As H)
union
(select time_format(timediff(now(), DATE_SUB(now(),INTERVAL 5 HOUR)),'%k') As H);
H
5
select last_day('0000-00-00');
last_day('0000-00-00')
NULL
select isnull(week(now() + 0)), isnull(week(now() + 0.2)),
week(20061108), week(20061108.01), week(20061108085411.000002);
isnull(week(now() + 0))	isnull(week(now() + 0.2))	week(20061108)	week(20061108.01)	week(20061108085411.000002)
0	0	45	NULL	45
Warnings:
Warning	1292	Incorrect datetime value: '20061108.01'
End of 4.1 tests
select time_format('100:00:00', '%H %k %h %I %l');
time_format('100:00:00', '%H %k %h %I %l')
100 100 04 04 4
SET @old_log_bin_trust_function_creators= @@global.log_bin_trust_function_creators;
SET GLOBAL log_bin_trust_function_creators = 1;
create table t1 (a timestamp default '2005-05-05 01:01:01',
b timestamp default '2005-05-05 01:01:01');
drop function if exists t_slow_sysdate;
create function t_slow_sysdate() returns timestamp
begin
do sleep(2);
return sysdate();
end;
//
insert into t1 set a = sysdate(), b = t_slow_sysdate();//
create trigger t_before before insert on t1
for each row begin
set new.b = t_slow_sysdate();
end
//
insert into t1 set a = sysdate();
select a != b from t1;
a != b
1
1
drop trigger t_before;
drop function t_slow_sysdate;
drop table t1;
SET GLOBAL log_bin_trust_function_creators = 0;
create table t1 (a datetime, i int, b datetime);
insert into t1 select sysdate(), sleep(2), sysdate() from dual;
select a != b from t1;
a != b
1
drop table t1;
create procedure t_sysdate()
begin
select sysdate() into @a;
do sleep(2);
select sysdate() into @b;
select @a != @b;
end;
//
call t_sysdate();
@a != @b
1
drop procedure t_sysdate;
SET @@global.log_bin_trust_function_creators= @old_log_bin_trust_function_creators;
select timestampdiff(month,'2004-09-11','2004-09-11');
timestampdiff(month,'2004-09-11','2004-09-11')
0
select timestampdiff(month,'2004-09-11','2005-09-11');
timestampdiff(month,'2004-09-11','2005-09-11')
12
select timestampdiff(month,'2004-09-11','2006-09-11');
timestampdiff(month,'2004-09-11','2006-09-11')
24
select timestampdiff(month,'2004-09-11','2007-09-11');
timestampdiff(month,'2004-09-11','2007-09-11')
36
select timestampdiff(month,'2005-09-11','2004-09-11');
timestampdiff(month,'2005-09-11','2004-09-11')
-12
select timestampdiff(month,'2005-09-11','2003-09-11');
timestampdiff(month,'2005-09-11','2003-09-11')
-24
select timestampdiff(month,'2004-02-28','2005-02-28');
timestampdiff(month,'2004-02-28','2005-02-28')
12
select timestampdiff(month,'2004-02-29','2005-02-28');
timestampdiff(month,'2004-02-29','2005-02-28')
11
select timestampdiff(month,'2004-02-28','2005-02-28');
timestampdiff(month,'2004-02-28','2005-02-28')
12
select timestampdiff(month,'2004-03-29','2005-03-28');
timestampdiff(month,'2004-03-29','2005-03-28')
11
select timestampdiff(month,'2003-02-28','2004-02-29');
timestampdiff(month,'2003-02-28','2004-02-29')
12
select timestampdiff(month,'2003-02-28','2005-02-28');
timestampdiff(month,'2003-02-28','2005-02-28')
24
select timestampdiff(month,'1999-09-11','2001-10-10');
timestampdiff(month,'1999-09-11','2001-10-10')
24
select timestampdiff(month,'1999-09-11','2001-9-11');
timestampdiff(month,'1999-09-11','2001-9-11')
24
select timestampdiff(year,'1999-09-11','2001-9-11');
timestampdiff(year,'1999-09-11','2001-9-11')
2
select timestampdiff(year,'2004-02-28','2005-02-28');
timestampdiff(year,'2004-02-28','2005-02-28')
1
select timestampdiff(year,'2004-02-29','2005-02-28');
timestampdiff(year,'2004-02-29','2005-02-28')
0
CREATE TABLE t1 (id int NOT NULL PRIMARY KEY, day date);
CREATE TABLE t2 (id int NOT NULL PRIMARY KEY, day date);
INSERT INTO t1 VALUES
(1, '2005-06-01'), (2, '2005-02-01'), (3, '2005-07-01');
INSERT INTO t2 VALUES
(1, '2005-08-01'), (2, '2005-06-15'), (3, '2005-07-15');
SELECT * FROM t1, t2 
WHERE t1.day BETWEEN 
'2005.09.01' - INTERVAL 6 MONTH AND t2.day;
id	day	id	day
1	2005-06-01	1	2005-08-01
3	2005-07-01	1	2005-08-01
1	2005-06-01	2	2005-06-15
1	2005-06-01	3	2005-07-15
3	2005-07-01	3	2005-07-15
SELECT * FROM t1, t2 
WHERE CAST(t1.day AS DATE) BETWEEN 
'2005.09.01' - INTERVAL 6 MONTH AND t2.day;
id	day	id	day
1	2005-06-01	1	2005-08-01
3	2005-07-01	1	2005-08-01
1	2005-06-01	2	2005-06-15
1	2005-06-01	3	2005-07-15
3	2005-07-01	3	2005-07-15
DROP TABLE t1,t2;
set time_zone= @@global.time_zone;
select str_to_date('10:00 PM', '%h:%i %p') + INTERVAL 10 MINUTE;
str_to_date('10:00 PM', '%h:%i %p') + INTERVAL 10 MINUTE
NULL
Warnings:
Warning	1411	Incorrect datetime value: '10:00 PM' for function str_to_date
select str_to_date("1997-00-04 22:23:00","%Y-%m-%D") + interval 10 minute;
str_to_date("1997-00-04 22:23:00","%Y-%m-%D") + interval 10 minute
NULL
Warnings:
Warning	1411	Incorrect datetime value: '1997-00-04 22:23:00' for function str_to_date
create table t1 (field DATE);
insert into t1 values ('2006-11-06');
select * from t1 where field < '2006-11-06 04:08:36.0';
field
2006-11-06
select * from t1 where field = '2006-11-06 04:08:36.0';
field
select * from t1 where field = '2006-11-06';
field
2006-11-06
select * from t1 where CAST(field as DATETIME) < '2006-11-06 04:08:36.0';
field
2006-11-06
select * from t1 where CAST(field as DATE) < '2006-11-06 04:08:36.0';
field
2006-11-06
drop table t1;
CREATE TABLE t1 (a int, t1 time, t2 time, d date, PRIMARY KEY  (a));
INSERT INTO t1 VALUES (1, '10:00:00', NULL, NULL), 
(2, '11:00:00', '11:15:00', '1972-02-06');
SELECT t1, t2, SEC_TO_TIME( TIME_TO_SEC( t2 ) - TIME_TO_SEC( t1 ) ), QUARTER(d) 
FROM t1;
t1	t2	SEC_TO_TIME( TIME_TO_SEC( t2 ) - TIME_TO_SEC( t1 ) )	QUARTER(d)
10:00:00	NULL	NULL	NULL
11:00:00	11:15:00	00:15:00	1
SELECT t1, t2, SEC_TO_TIME( TIME_TO_SEC( t2 ) - TIME_TO_SEC( t1 ) ), QUARTER(d)
FROM t1 ORDER BY a DESC;
t1	t2	SEC_TO_TIME( TIME_TO_SEC( t2 ) - TIME_TO_SEC( t1 ) )	QUARTER(d)
11:00:00	11:15:00	00:15:00	1
10:00:00	NULL	NULL	NULL
DROP TABLE t1;
SELECT TIME_FORMAT(SEC_TO_TIME(a),"%H:%i:%s") FROM (SELECT 3020399 AS a UNION SELECT 3020398 ) x GROUP BY 1;
TIME_FORMAT(SEC_TO_TIME(a),"%H:%i:%s")
838:59:58
838:59:59
set names latin1;
create table t1 (a varchar(15) character set ascii not null);
insert into t1 values ('070514-000000');
select concat(a,ifnull(min(date_format(now(), '%Y-%m-%d')),' ull')) from t1;
concat(a,ifnull(min(date_format(now(), '%Y-%m-%d')),' ull'))
#
set names swe7;
select concat(a,ifnull(min(date_format(now(), '%Y-%m-%d')),' ull')) from t1;
ERROR HY000: Illegal mix of collations (ascii_general_ci,IMPLICIT) and (swe7_swedish_ci,COERCIBLE) for operation 'concat'
set names latin1;
set lc_time_names=fr_FR;
select concat(a,ifnull(min(date_format(now(), '%Y-%m-%d')),' ull')) from t1;
ERROR HY000: Illegal mix of collations (ascii_general_ci,IMPLICIT) and (latin1_swedish_ci,COERCIBLE) for operation 'concat'
set lc_time_names=en_US;
drop table t1;
select DATE_ADD('20071108181000', INTERVAL 1 DAY);
DATE_ADD('20071108181000', INTERVAL 1 DAY)
2007-11-09 18:10:00
select DATE_ADD(20071108181000,   INTERVAL 1 DAY);
DATE_ADD(20071108181000,   INTERVAL 1 DAY)
2007-11-09 18:10:00
select DATE_ADD('20071108',       INTERVAL 1 DAY);
DATE_ADD('20071108',       INTERVAL 1 DAY)
2007-11-09
select DATE_ADD(20071108,         INTERVAL 1 DAY);
DATE_ADD(20071108,         INTERVAL 1 DAY)
2007-11-09
select LAST_DAY('2007-12-06 08:59:19.05') - INTERVAL 1 SECOND;
LAST_DAY('2007-12-06 08:59:19.05') - INTERVAL 1 SECOND
2007-12-30 23:59:59
select date_add('1000-01-01 00:00:00', interval '1.03:02:01.05' day_microsecond);
date_add('1000-01-01 00:00:00', interval '1.03:02:01.05' day_microsecond)
1000-01-02 03:02:01.050000
select date_add('1000-01-01 00:00:00', interval '1.02' day_microsecond);
date_add('1000-01-01 00:00:00', interval '1.02' day_microsecond)
1000-01-01 00:00:01.020000
#
# Bug #52315 part 2 : utc_date() crashes when system time > year 2037
#
SET TIMESTAMP=-147490000;
SELECT UTC_TIMESTAMP();
SET TIMESTAMP=2147483648;
SELECT UTC_TIMESTAMP();
SET TIMESTAMP=2147483646;
SELECT UTC_TIMESTAMP();
SET TIMESTAMP=2147483647;
SELECT UTC_TIMESTAMP();
SET TIMESTAMP=0;
SELECT UTC_TIMESTAMP();
SET TIMESTAMP=-1;
SELECT UTC_TIMESTAMP();
SET TIMESTAMP=1;
SELECT UTC_TIMESTAMP();
SET TIMESTAMP=0;
End of 5.0 tests
select date_sub("0050-01-01 00:00:01",INTERVAL 2 SECOND);
date_sub("0050-01-01 00:00:01",INTERVAL 2 SECOND)
0049-12-31 23:59:59
select date_sub("0199-01-01 00:00:01",INTERVAL 2 SECOND);
date_sub("0199-01-01 00:00:01",INTERVAL 2 SECOND)
0198-12-31 23:59:59
select date_add("0199-12-31 23:59:59",INTERVAL 2 SECOND);
date_add("0199-12-31 23:59:59",INTERVAL 2 SECOND)
0200-01-01 00:00:01
select date_sub("0200-01-01 00:00:01",INTERVAL 2 SECOND);
date_sub("0200-01-01 00:00:01",INTERVAL 2 SECOND)
0199-12-31 23:59:59
select date_sub("0200-01-01 00:00:01",INTERVAL 1 SECOND);
date_sub("0200-01-01 00:00:01",INTERVAL 1 SECOND)
0200-01-01 00:00:00
select date_sub("0200-01-01 00:00:01",INTERVAL 2 SECOND);
date_sub("0200-01-01 00:00:01",INTERVAL 2 SECOND)
0199-12-31 23:59:59
select date_add("2001-01-01 23:59:59",INTERVAL -2000 YEAR);
date_add("2001-01-01 23:59:59",INTERVAL -2000 YEAR)
0001-01-01 23:59:59
select date_sub("50-01-01 00:00:01",INTERVAL 2 SECOND);
date_sub("50-01-01 00:00:01",INTERVAL 2 SECOND)
2049-12-31 23:59:59
select date_sub("90-01-01 00:00:01",INTERVAL 2 SECOND);
date_sub("90-01-01 00:00:01",INTERVAL 2 SECOND)
1989-12-31 23:59:59
select date_sub("0069-01-01 00:00:01",INTERVAL 2 SECOND);
date_sub("0069-01-01 00:00:01",INTERVAL 2 SECOND)
0068-12-31 23:59:59
select date_sub("0169-01-01 00:00:01",INTERVAL 2 SECOND);
date_sub("0169-01-01 00:00:01",INTERVAL 2 SECOND)
0168-12-31 23:59:59
CREATE TABLE t1(a DOUBLE NOT NULL);
INSERT INTO t1 VALUES (0),(9.216e-096);
# should not crash
SELECT 1 FROM t1 ORDER BY @x:=makedate(a,a);
1
1
1
DROP TABLE t1;
#
# Bug #52160: crash and inconsistent results when grouping
#             by a function and column
#
CREATE TABLE t1(a CHAR(10) NOT NULL);
INSERT INTO t1 VALUES (''),('');
SELECT COUNT(*) FROM t1 GROUP BY TIME_TO_SEC(a);
COUNT(*)
2
Warnings:
Warning	1292	Truncated incorrect time value: ''
Warning	1292	Truncated incorrect time value: ''
Warning	1292	Truncated incorrect time value: ''
DROP TABLE t1;
#
# Bug#11766112  59151:UNINITIALIZED VALUES IN EXTRACT_DATE_TIME WITH STR_TO_DATE(SPACE(..) ...
#
SELECT STR_TO_DATE(SPACE(2),'1');
STR_TO_DATE(SPACE(2),'1')
0000-00-00
#
# Bug#11765216  58154: UNINITIALIZED VARIABLE FORMAT IN STR_TO_DATE FUNCTION
#
SET GLOBAL SQL_MODE='';
DO  STR_TO_DATE((''), FROM_DAYS(@@GLOBAL.SQL_MODE));
SET GLOBAL SQL_MODE=DEFAULT;
#
# Bug#11766087  59125: VALGRIND UNINITIALISED VALUE WARNING IN ULL2DEC, LONGLONG2DECIMAL
#
SELECT FORMAT(YEAR(STR_TO_DATE('',GET_FORMAT(TIME,''))),1);
FORMAT(YEAR(STR_TO_DATE('',GET_FORMAT(TIME,''))),1)
NULL
#
# Bug#11766126  59166: ANOTHER DATETIME VALGRIND UNINITIALIZED WARNING
#
SELECT CAST((MONTH(FROM_UNIXTIME(@@GLOBAL.SQL_MODE))) AS BINARY(1025));
#
# Bug#11766124  59164: VALGRIND: UNINITIALIZED VALUE IN NUMBER_TO_DATETIME
#
SELECT ADDDATE(MONTH(FROM_UNIXTIME(NULL)),INTERVAL 1 HOUR);
ADDDATE(MONTH(FROM_UNIXTIME(NULL)),INTERVAL 1 HOUR)
NULL
#
# Bug#11889186  60503: CRASH IN MAKE_DATE_TIME WITH DATE_FORMAT / STR_TO_DATE COMBINATION
#
SELECT DATE_FORMAT('0000-00-11', '%W');
DATE_FORMAT('0000-00-11', '%W')
NULL
SELECT DATE_FORMAT('0000-00-11', '%a');
DATE_FORMAT('0000-00-11', '%a')
NULL
SELECT DATE_FORMAT('0000-00-11', '%w');
DATE_FORMAT('0000-00-11', '%w')
NULL
#
# Bug#12403504  AFTER FIX FOR #11889186 : ASSERTION FAILED: DELSUM+(INT) Y/4-TEMP > 0
#
SELECT MAKEDATE(11111111,1);
MAKEDATE(11111111,1)
NULL
SELECT WEEK(DATE_ADD(FROM_DAYS(1),INTERVAL 1 MONTH), 1);
WEEK(DATE_ADD(FROM_DAYS(1),INTERVAL 1 MONTH), 1)
0
#
# Bug#12584302 AFTER FIX FOR #12403504: ASSERTION FAILED: DELSUM+(INT) Y/4-TEMP > 0,
#
DO WEEK((DATE_ADD((CAST(0 AS DATE)), INTERVAL 1 YEAR_MONTH)), 5);
Warnings:
Warning	1292	Incorrect datetime value: '0'
#
# BUG#13458237 INCONSISTENT HANDLING OF INVALIDE DATES WITH ZERO DAY
# SIMILAR TO '2009-10-00' 
#
SELECT
DATE('20091000'),
STR_TO_DATE('200910','%Y%m'),
LAST_DAY('2009-10-00'),
LAST_DAY(DATE('2009-10-00')),
LAST_DAY(DATE'2009-10-00'),
LAST_DAY(STR_TO_DATE('200910','%Y%m')),
WEEK('2009-10-00'),
WEEK(DATE('2009-10-00')),
WEEK(DATE'2009-10-00'),
WEEK(STR_TO_DATE('200910','%Y%m')),
WEEKOFYEAR('2009-10-00'),
WEEKOFYEAR(DATE('2009-10-00')),
WEEKOFYEAR(DATE'2009-10-00'),
WEEKOFYEAR(STR_TO_DATE('200910','%Y%m')),
DAYOFYEAR('2009-10-00'),
DAYOFYEAR(DATE('2009-10-00')),
DAYOFYEAR(DATE'2009-10-00'),
DAYOFYEAR(STR_TO_DATE('200910','%Y%m')),
WEEKDAY('2009-10-00'),
WEEKDAY(DATE('2009-10-00')),
WEEKDAY(DATE'2009-10-00'),
WEEKDAY(STR_TO_DATE('200910','%Y%m')),
TO_DAYs('2009-10-00'),
TO_DAYs(DATE('2009-10-00')),
TO_DAYs(DATE'2009-10-00'),
TO_DAYs(STR_TO_DATE('200910','%Y%m'));
DATE('20091000')	2009-10-00
STR_TO_DATE('200910','%Y%m')	2009-10-00
LAST_DAY('2009-10-00')	2009-10-31
LAST_DAY(DATE('2009-10-00'))	2009-10-31
LAST_DAY(DATE'2009-10-00')	2009-10-31
LAST_DAY(STR_TO_DATE('200910','%Y%m'))	2009-10-31
WEEK('2009-10-00')	NULL
WEEK(DATE('2009-10-00'))	NULL
WEEK(DATE'2009-10-00')	NULL
WEEK(STR_TO_DATE('200910','%Y%m'))	NULL
WEEKOFYEAR('2009-10-00')	NULL
WEEKOFYEAR(DATE('2009-10-00'))	NULL
WEEKOFYEAR(DATE'2009-10-00')	NULL
WEEKOFYEAR(STR_TO_DATE('200910','%Y%m'))	NULL
DAYOFYEAR('2009-10-00')	NULL
DAYOFYEAR(DATE('2009-10-00'))	NULL
DAYOFYEAR(DATE'2009-10-00')	NULL
DAYOFYEAR(STR_TO_DATE('200910','%Y%m'))	NULL
WEEKDAY('2009-10-00')	NULL
WEEKDAY(DATE('2009-10-00'))	NULL
WEEKDAY(DATE'2009-10-00')	NULL
WEEKDAY(STR_TO_DATE('200910','%Y%m'))	NULL
TO_DAYs('2009-10-00')	NULL
TO_DAYs(DATE('2009-10-00'))	NULL
TO_DAYs(DATE'2009-10-00')	NULL
TO_DAYs(STR_TO_DATE('200910','%Y%m'))	NULL
Warnings:
Level	Warning
Code	1292
Message	Incorrect datetime value: '2009-10-00'
Level	Warning
Code	1292
Message	Incorrect datetime value: '2009-10-00'
Level	Warning
Code	1292
Message	Incorrect datetime value: '2009-10-00'
Level	Warning
Code	1411
Message	Incorrect datetime value: '200910' for function str_to_date
Level	Warning
Code	1292
Message	Incorrect datetime value: '2009-10-00'
Level	Warning
Code	1292
Message	Incorrect datetime value: '2009-10-00'
Level	Warning
Code	1292
Message	Incorrect datetime value: '2009-10-00'
Level	Warning
Code	1411
Message	Incorrect datetime value: '200910' for function str_to_date
Level	Warning
Code	1292
Message	Incorrect datetime value: '2009-10-00'
Level	Warning
Code	1292
Message	Incorrect datetime value: '2009-10-00'
Level	Warning
Code	1292
Message	Incorrect datetime value: '2009-10-00'
Level	Warning
Code	1411
Message	Incorrect datetime value: '200910' for function str_to_date
Level	Warning
Code	1292
Message	Incorrect datetime value: '2009-10-00'
Level	Warning
Code	1292
Message	Incorrect datetime value: '2009-10-00'
Level	Warning
Code	1292
Message	Incorrect datetime value: '2009-10-00'
Level	Warning
Code	1411
Message	Incorrect datetime value: '200910' for function str_to_date
Level	Warning
Code	1292
Message	Incorrect datetime value: '2009-10-00'
Level	Warning
Code	1292
Message	Incorrect datetime value: '2009-10-00'
Level	Warning
Code	1292
Message	Incorrect datetime value: '2009-10-00'
Level	Warning
Code	1411
Message	Incorrect datetime value: '200910' for function str_to_date
SELECT
DATE('00000100'),
STR_TO_DATE('000001','%Y%m'),
LAST_DAY('0000-01-00'),
LAST_DAY(DATE('0000-01-00')),
LAST_DAY(DATE'0000-01-00'),
LAST_DAY(STR_TO_DATE('000001','%Y%m')),
WEEK('0000-01-00'),
WEEK(DATE('0000-01-00')),
WEEK(DATE'0000-01-00'),
WEEK(STR_TO_DATE('000001','%Y%m')),
WEEKOFYEAR('0000-01-00'),
WEEKOFYEAR(DATE('0000-01-00')),
WEEKOFYEAR(DATE'0000-01-00'),
WEEKOFYEAR(STR_TO_DATE('000001','%Y%m')),
DAYOFYEAR('0000-01-00'),
DAYOFYEAR(DATE('0000-01-00')),
DAYOFYEAR(DATE'0000-01-00'),
DAYOFYEAR(STR_TO_DATE('000001','%Y%m')),
WEEKDAY('0000-01-00'),
WEEKDAY(DATE('0000-01-00')),
WEEKDAY(DATE'0000-01-00'),
WEEKDAY(STR_TO_DATE('000001','%Y%m')),
TO_DAYs('0000-01-00'),
TO_DAYs(DATE('0000-01-00')),
TO_DAYs(DATE'0000-01-00'),
TO_DAYs(STR_TO_DATE('000001','%Y%m'));
DATE('00000100')	0000-01-00
STR_TO_DATE('000001','%Y%m')	0000-01-00
LAST_DAY('0000-01-00')	0000-01-31
LAST_DAY(DATE('0000-01-00'))	0000-01-31
LAST_DAY(DATE'0000-01-00')	0000-01-31
LAST_DAY(STR_TO_DATE('000001','%Y%m'))	0000-01-31
WEEK('0000-01-00')	NULL
WEEK(DATE('0000-01-00'))	NULL
WEEK(DATE'0000-01-00')	NULL
WEEK(STR_TO_DATE('000001','%Y%m'))	NULL
WEEKOFYEAR('0000-01-00')	NULL
WEEKOFYEAR(DATE('0000-01-00'))	NULL
WEEKOFYEAR(DATE'0000-01-00')	NULL
WEEKOFYEAR(STR_TO_DATE('000001','%Y%m'))	NULL
DAYOFYEAR('0000-01-00')	NULL
DAYOFYEAR(DATE('0000-01-00'))	NULL
DAYOFYEAR(DATE'0000-01-00')	NULL
DAYOFYEAR(STR_TO_DATE('000001','%Y%m'))	NULL
WEEKDAY('0000-01-00')	NULL
WEEKDAY(DATE('0000-01-00'))	NULL
WEEKDAY(DATE'0000-01-00')	NULL
WEEKDAY(STR_TO_DATE('000001','%Y%m'))	NULL
TO_DAYs('0000-01-00')	NULL
TO_DAYs(DATE('0000-01-00'))	NULL
TO_DAYs(DATE'0000-01-00')	NULL
TO_DAYs(STR_TO_DATE('000001','%Y%m'))	NULL
Warnings:
Level	Warning
Code	1292
Message	Incorrect datetime value: '0000-01-00'
Level	Warning
Code	1292
Message	Incorrect datetime value: '0000-01-00'
Level	Warning
Code	1292
Message	Incorrect datetime value: '0000-01-00'
Level	Warning
Code	1411
Message	Incorrect datetime value: '000001' for function str_to_date
Level	Warning
Code	1292
Message	Incorrect datetime value: '0000-01-00'
Level	Warning
Code	1292
Message	Incorrect datetime value: '0000-01-00'
Level	Warning
Code	1292
Message	Incorrect datetime value: '0000-01-00'
Level	Warning
Code	1411
Message	Incorrect datetime value: '000001' for function str_to_date
Level	Warning
Code	1292
Message	Incorrect datetime value: '0000-01-00'
Level	Warning
Code	1292
Message	Incorrect datetime value: '0000-01-00'
Level	Warning
Code	1292
Message	Incorrect datetime value: '0000-01-00'
Level	Warning
Code	1411
Message	Incorrect datetime value: '000001' for function str_to_date
Level	Warning
Code	1292
Message	Incorrect datetime value: '0000-01-00'
Level	Warning
Code	1292
Message	Incorrect datetime value: '0000-01-00'
Level	Warning
Code	1292
Message	Incorrect datetime value: '0000-01-00'
Level	Warning
Code	1411
Message	Incorrect datetime value: '000001' for function str_to_date
Level	Warning
Code	1292
Message	Incorrect datetime value: '0000-01-00'
Level	Warning
Code	1292
Message	Incorrect datetime value: '0000-01-00'
Level	Warning
Code	1292
Message	Incorrect datetime value: '0000-01-00'
Level	Warning
Code	1411
Message	Incorrect datetime value: '000001' for function str_to_date
End of 5.1 tests
#
# Bug#57039: constant subtime expression returns incorrect result.
#
CREATE TABLE t1 (`date_date` datetime NOT NULL);
INSERT INTO t1 VALUES ('2008-01-03 00:00:00'), ('2008-01-03 00:00:00');
SELECT * FROM t1 WHERE date_date >= subtime(now(), "00:30:00");
date_date
SELECT * FROM t1 WHERE date_date <= addtime(date_add("2000-1-1", INTERVAL "1:1:1" HOUR_SECOND), "00:20:00");
date_date
DROP TABLE t1;
#
# Bug#57512 str_to_date crash...
#
SELECT WEEK(STR_TO_DATE(NULL,0));
WEEK(STR_TO_DATE(NULL,0))
NULL
SELECT SUBDATE(STR_TO_DATE(NULL,0), INTERVAL 1 HOUR);
SUBDATE(STR_TO_DATE(NULL,0), INTERVAL 1 HOUR)
NULL
#
# BUG#59895 - setting storage engine to null segfaults mysqld
#
SELECT MONTHNAME(0), MONTHNAME(0) IS NULL, MONTHNAME(0) + 1;
MONTHNAME(0)	MONTHNAME(0) IS NULL	MONTHNAME(0) + 1
NULL	1	NULL
SET storage_engine=NULL;
ERROR 42000: Variable 'storage_engine' can't be set to the value of 'NULL'
#
# BUG#13354387 - CRASH IN IN MY_DECIMAL::OPERATOR FOR VIEW AND FUNCTION UNIX_TIMESTAMP 
# Part1 (5.5)
SET time_zone='+03:00';
CREATE TABLE t1 (a DATETIME NOT NULL);
INSERT INTO t1 VALUES ('2009-09-20 07:32:39.06');
INSERT INTO t1 VALUES ('0000-00-00 00:00:00.00');
CREATE VIEW v1 AS SELECT * FROM t1;
SELECT CAST(UNIX_TIMESTAMP(a) AS DECIMAL(25,3)) AS c1 FROM v1 ORDER BY 1;
c1
NULL
1253421159.000
DROP VIEW v1;
DROP TABLE t1;
SET time_zone=DEFAULT;
#
# Bug #59686 crash in String::copy() with time data type
#
SELECT min(timestampadd(month, 1>'', from_days('%Z')));
min(timestampadd(month, 1>'', from_days('%Z')))
NULL
Warnings:
Warning	1292	Truncated incorrect INTEGER value: '%Z'
create table t1(a time);
insert into t1 values ('00:00:00'),('00:01:00');
select 1 from t1 where 1 < some (select cast(a as datetime) from t1);
1
drop table t1;
select time('10:10:10') > 10;
time('10:10:10') > 10
1
select time('10:10:10') > 1010;
time('10:10:10') > 1010
1
select time('10:10:09') > 101010;
time('10:10:09') > 101010
0
select time('10:10:10') > 101010;
time('10:10:10') > 101010
0
select time('10:10:11') > 101010;
time('10:10:11') > 101010
1
select time(' 1 02:03:04') + interval 9 microsecond;
time(' 1 02:03:04') + interval 9 microsecond
26:03:04.000009
select time(' 1 02:03:04') - interval 9 microsecond;
time(' 1 02:03:04') - interval 9 microsecond
26:03:03.999991
select time('-1 02:03:04') + interval 9 microsecond;
time('-1 02:03:04') + interval 9 microsecond
-26:03:03.999991
select time('-1 02:03:04') - interval 9 microsecond;
time('-1 02:03:04') - interval 9 microsecond
-26:03:04.000009
select time(' 1 02:03:04') + interval '4:4:4' hour_second;
time(' 1 02:03:04') + interval '4:4:4' hour_second
30:07:08
select time(' 1 02:03:04') - interval '4:4:4' hour_second;
time(' 1 02:03:04') - interval '4:4:4' hour_second
21:59:00
select time('-1 02:03:04') + interval '4:4:4' hour_second;
time('-1 02:03:04') + interval '4:4:4' hour_second
-21:59:00
select time('-1 02:03:04') - interval '4:4:4' hour_second;
time('-1 02:03:04') - interval '4:4:4' hour_second
-30:07:08
select time(' 1 02:03:04') + interval 2 day;
time(' 1 02:03:04') + interval 2 day
74:03:04
select time(' 1 02:03:04') - interval 2 day;
time(' 1 02:03:04') - interval 2 day
-21:56:56
select time('-1 02:03:04') + interval 2 day;
time('-1 02:03:04') + interval 2 day
21:56:56
select time('-1 02:03:04') - interval 2 day;
time('-1 02:03:04') - interval 2 day
-74:03:04
select time('10 02:03:04') + interval 30 day;
time('10 02:03:04') + interval 30 day
NULL
Warnings:
Warning	1441	Datetime function: time field overflow
select time('10 02:03:04') + interval 1 year;
time('10 02:03:04') + interval 1 year
NULL
Warnings:
Warning	1441	Datetime function: time field overflow
select cast('131415.123e0' as time);
cast('131415.123e0' as time)
00:00:00
Warnings:
Warning	1292	Truncated incorrect time value: '131415.123e0'
select cast('2010-01-02 03:04:05' as datetime) between null and '2010-01-02 03:04:04';
cast('2010-01-02 03:04:05' as datetime) between null and '2010-01-02 03:04:04'
0
select least(time('1:2:3'), '01:02:04', null) div 1;
least(time('1:2:3'), '01:02:04', null) div 1
NULL
select truncate(least(time('1:2:3'), '01:02:04', null), 6);
truncate(least(time('1:2:3'), '01:02:04', null), 6)
NULL
select cast(least(time('1:2:3'), '01:02:04', null) as decimal(3,1));
cast(least(time('1:2:3'), '01:02:04', null) as decimal(3,1))
NULL
select unix_timestamp(null);
unix_timestamp(null)
NULL
select truncate(date('2010-40-10'), 6);
truncate(date('2010-40-10'), 6)
0.000000
Warnings:
Warning	1292	Incorrect datetime value: '2010-40-10'
select extract(month from '2010-40-50');
extract(month from '2010-40-50')
0
Warnings:
Warning	1292	Incorrect datetime value: '2010-40-50'
select subtime('0000-00-10 10:10:10', '30 10:00:00');
subtime('0000-00-10 10:10:10', '30 10:00:00')
NULL
select cast(str_to_date(NULL, '%H:%i:%s') as time);
cast(str_to_date(NULL, '%H:%i:%s') as time)
NULL
create table t1 (f1 datetime, key (f1));
insert into t1 values ('2000-09-12 00:00:00'), ('2007-04-25 05:08:49');
select * from t1 where f1 > time('-23:00:06');
f1
2000-09-12 00:00:00
2007-04-25 05:08:49
drop table t1;
select maketime(20,61,10)+0;
maketime(20,61,10)+0
NULL
create table t1 (f2 int not null) ;
insert into t1 values (0),(0);
select last_day(f2) from t1;
last_day(f2)
NULL
NULL
Warnings:
Warning	1292	Incorrect datetime value: '0'
Warning	1292	Incorrect datetime value: '0'
select last_day(f2) from t1 where last_day(f2) is null;
last_day(f2)
NULL
NULL
Warnings:
Warning	1292	Incorrect datetime value: '0'
Warning	1292	Incorrect datetime value: '0'
Warning	1292	Incorrect datetime value: '0'
Warning	1292	Incorrect datetime value: '0'
select * from t1 order by last_day (f2);
f2
0
0
Warnings:
Warning	1292	Incorrect datetime value: '0'
Warning	1292	Incorrect datetime value: '0'
drop table t1;
select convert_tz(timediff('0000-00-00 00:00:00', cast('2008-03-26 07:09:06' as datetime)), 'UTC', 'Europe/Moscow');
convert_tz(timediff('0000-00-00 00:00:00', cast('2008-03-26 07:09:06' as datetime)), 'UTC', 'Europe/Moscow')
NULL
create table t1 (f1 integer, f2 date);
insert into t1 values (1,'2011-05-05'),(2,'2011-05-05'),(3,'2011-05-05'),(4,'2011-05-05'),(5,'2011-05-05'),(6, '2011-05-06');
select * from t1 where 1 and concat(f2)=MAKEDATE(2011, 125);
f1	f2
1	2011-05-05
2	2011-05-05
3	2011-05-05
4	2011-05-05
5	2011-05-05
drop table t1;
create table t1 (f1 timestamp);
insert into t1 values ('0000-00-00 00:00:00');
select least(1, f1) from t1;
least(1, f1)
0000-00-00 00:00:00
Warnings:
Warning	1292	Incorrect datetime value: '1'
drop table t1;
select now() > coalesce(time('21:43:24'), date('2010-05-03'));
now() > coalesce(time('21:43:24'), date('2010-05-03'))
1
create table t1 (f1 timestamp);
select * from t1 where f1 > f1 and f1 <=> timestampadd(hour, 9 , '2010-01-01 16:55:35');
f1
drop table t1;
create table t1 (f1 date);
insert into t1 values ('0000-00-00');
select timestampadd(week, 1, f1) from t1;
timestampadd(week, 1, f1)
NULL
select timestampadd(week, 1, date("0000-00-00"));
timestampadd(week, 1, date("0000-00-00"))
NULL
Warnings:
Warning	1292	Incorrect datetime value: '0000-00-00'
drop table t1;
create table t1 (f2 time not null, f3 datetime, f4 int not null, f5 timestamp);
insert ignore t1 values ('04:38:11','0000-00-00 00:00:00',0,'0000-00-00 00:00:00');
select least(greatest(f3, f2, f4), f5) from t1;
least(greatest(f3, f2, f4), f5)
0000-00-00 00:00:00
Warnings:
Warning	1292	Incorrect datetime value: '0'
drop table t1;
select day(coalesce(null));
day(coalesce(null))
NULL
select timestamp(greatest('2002-08-20', '0000-00-00 00:00:00'));
timestamp(greatest('2002-08-20', '0000-00-00 00:00:00'))
2002-08-20 00:00:00
create table t1 (f1 datetime);
insert into t1 values ('0000-00-00 00:00:00');
select cast(f1 AS time) from t1;
cast(f1 AS time)
00:00:00
drop table t1;
select greatest(cast("0-0-0" as date), cast("10:20:05" as time));
greatest(cast("0-0-0" as date), cast("10:20:05" as time))
0000-00-00
select greatest(cast("0-0-0" as date), cast("10:20:05" as time)) = '0000-00-00';
greatest(cast("0-0-0" as date), cast("10:20:05" as time)) = '0000-00-00'
1
select cast(greatest(cast("0-0-0" as date), cast("10:20:05" as time)) as datetime(6));
cast(greatest(cast("0-0-0" as date), cast("10:20:05" as time)) as datetime(6))
0000-00-00 00:00:00.000000
select microsecond('12:00:00.123456'), microsecond('2009-12-31 23:59:59.000010');
microsecond('12:00:00.123456')	microsecond('2009-12-31 23:59:59.000010')
123456	10
select now(258);
ERROR 42000: Too big precision 258 specified for 'now'. Maximum is 6.
SELECT 1 FROM DUAL WHERE YEAR(TIMEDIFF(NULL, '12:12:12'));
1
SELECT 1 FROM DUAL WHERE MONTH(TIMEDIFF(NULL, '12:12:12'));
1
SELECT 1 FROM DUAL WHERE DAYOFMONTH(TIMEDIFF(NULL, '12:12:12'));
1
SELECT 1 FROM DUAL WHERE HOUR(TIMEDIFF(NULL, '12:12:12'));
1
SELECT 1 FROM DUAL WHERE MINUTE(TIMEDIFF(NULL, '12:12:12'));
1
SELECT 1 FROM DUAL WHERE SECOND(TIMEDIFF(NULL, '12:12:12'));
1