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drop table if exists t1, test;
select extract(DAY_MICROSECOND FROM "1999-01-02 10:11:12.000123");
extract(DAY_MICROSECOND FROM "1999-01-02 10:11:12.000123")
2101112000123
select extract(HOUR_MICROSECOND FROM "1999-01-02 10:11:12.000123");
extract(HOUR_MICROSECOND FROM "1999-01-02 10:11:12.000123")
101112000123
select extract(MINUTE_MICROSECOND FROM "1999-01-02 10:11:12.000123");
extract(MINUTE_MICROSECOND FROM "1999-01-02 10:11:12.000123")
1112000123
select extract(SECOND_MICROSECOND FROM "1999-01-02 10:11:12.000123");
extract(SECOND_MICROSECOND FROM "1999-01-02 10:11:12.000123")
12000123
select extract(MICROSECOND FROM "1999-01-02 10:11:12.000123");
extract(MICROSECOND FROM "1999-01-02 10:11:12.000123")
123
select date_format("1997-12-31 23:59:59.000002", "%f");
date_format("1997-12-31 23:59:59.000002", "%f")
000002
select date_add("1997-12-31 23:59:59.000002",INTERVAL "10000 99:99:99.999999" DAY_MICROSECOND);
date_add("1997-12-31 23:59:59.000002",INTERVAL "10000 99:99:99.999999" DAY_MICROSECOND)
2025-05-23 04:40:39.000001
select date_add("1997-12-31 23:59:59.000002",INTERVAL "10000:99:99.999999" HOUR_MICROSECOND);
date_add("1997-12-31 23:59:59.000002",INTERVAL "10000:99:99.999999" HOUR_MICROSECOND)
1999-02-21 17:40:39.000001
select date_add("1997-12-31 23:59:59.000002",INTERVAL "10000:99.999999" MINUTE_MICROSECOND);
date_add("1997-12-31 23:59:59.000002",INTERVAL "10000:99.999999" MINUTE_MICROSECOND)
1998-01-07 22:41:39.000001
select date_add("1997-12-31 23:59:59.000002",INTERVAL "10000.999999" SECOND_MICROSECOND);
date_add("1997-12-31 23:59:59.000002",INTERVAL "10000.999999" SECOND_MICROSECOND)
1998-01-01 02:46:40.000001
select date_add("1997-12-31 23:59:59.000002",INTERVAL "999999" MICROSECOND);
date_add("1997-12-31 23:59:59.000002",INTERVAL "999999" MICROSECOND)
1998-01-01 00:00:00.000001
select date_sub("1998-01-01 00:00:00.000001",INTERVAL "1 1:1:1.000002" DAY_MICROSECOND);
date_sub("1998-01-01 00:00:00.000001",INTERVAL "1 1:1:1.000002" DAY_MICROSECOND)
1997-12-30 22:58:58.999999
select date_sub("1998-01-01 00:00:00.000001",INTERVAL "1:1:1.000002" HOUR_MICROSECOND);
date_sub("1998-01-01 00:00:00.000001",INTERVAL "1:1:1.000002" HOUR_MICROSECOND)
1997-12-31 22:58:58.999999
select date_sub("1998-01-01 00:00:00.000001",INTERVAL "1:1.000002" MINUTE_MICROSECOND);
date_sub("1998-01-01 00:00:00.000001",INTERVAL "1:1.000002" MINUTE_MICROSECOND)
1997-12-31 23:58:58.999999
select date_sub("1998-01-01 00:00:00.000001",INTERVAL "1.000002" SECOND_MICROSECOND);
date_sub("1998-01-01 00:00:00.000001",INTERVAL "1.000002" SECOND_MICROSECOND)
1997-12-31 23:59:58.999999
select date_sub("1998-01-01 00:00:00.000001",INTERVAL "000002" MICROSECOND);
date_sub("1998-01-01 00:00:00.000001",INTERVAL "000002" MICROSECOND)
1997-12-31 23:59:59.999999
select adddate("1997-12-31 23:59:59.000001", 10);
adddate("1997-12-31 23:59:59.000001", 10)
1998-01-10 23:59:59.000001
select subdate("1997-12-31 23:59:59.000001", 10);
subdate("1997-12-31 23:59:59.000001", 10)
1997-12-21 23:59:59.000001
select datediff("1997-12-31 23:59:59.000001","1997-12-30");
datediff("1997-12-31 23:59:59.000001","1997-12-30")
1
select datediff("1997-11-30 23:59:59.000001","1997-12-31");
datediff("1997-11-30 23:59:59.000001","1997-12-31")
-31
SET @@SQL_MODE="ALLOW_INVALID_DATES";
select datediff("1997-11-31 23:59:59.000001","1997-12-31");
datediff("1997-11-31 23:59:59.000001","1997-12-31")
NULL
Warnings:
Warning 1292 Incorrect datetime value: '1997-11-31 23:59:59.000001'
SET @@SQL_MODE="";
select datediff("1997-11-31 23:59:59.000001","1997-12-31");
datediff("1997-11-31 23:59:59.000001","1997-12-31")
NULL
Warnings:
Warning 1292 Incorrect datetime value: '1997-11-31 23:59:59.000001'
select datediff("1997-11-30 23:59:59.000001",null);
datediff("1997-11-30 23:59:59.000001",null)
NULL
select weekofyear("1997-11-30 23:59:59.000001");
weekofyear("1997-11-30 23:59:59.000001")
48
select makedate(03,1);
makedate(03,1)
2003-01-01
select makedate('0003',1);
makedate('0003',1)
2003-01-01
select makedate(1997,1);
makedate(1997,1)
1997-01-01
select makedate(1997,0);
makedate(1997,0)
NULL
select makedate(9999,365);
makedate(9999,365)
9999-12-31
select makedate(9999,366);
makedate(9999,366)
NULL
select makedate(100,1);
makedate(100,1)
0100-01-01
select addtime("1997-12-31 23:59:59.999999", "1 1:1:1.000002");
addtime("1997-12-31 23:59:59.999999", "1 1:1:1.000002")
1998-01-02 01:01:01.000001
select subtime("1997-12-31 23:59:59.000001", "1 1:1:1.000002");
subtime("1997-12-31 23:59:59.000001", "1 1:1:1.000002")
1997-12-30 22:58:57.999999
select addtime("1997-12-31 23:59:59.999999", "1998-01-01 01:01:01.999999");
addtime("1997-12-31 23:59:59.999999", "1998-01-01 01:01:01.999999")
NULL
select subtime("1997-12-31 23:59:59.999999", "1998-01-01 01:01:01.999999");
subtime("1997-12-31 23:59:59.999999", "1998-01-01 01:01:01.999999")
NULL
select subtime("01:00:00.999999", "02:00:00.999998");
subtime("01:00:00.999999", "02:00:00.999998")
-00:59:59.999999
select subtime("02:01:01.999999", "01:01:01.999999");
subtime("02:01:01.999999", "01:01:01.999999")
01:00:00
select timediff("1997-01-01 23:59:59.000001","1995-12-31 23:59:59.000002");
timediff("1997-01-01 23:59:59.000001","1995-12-31 23:59:59.000002")
838:59:59.999999
Warnings:
Warning 1292 Truncated incorrect time value: '8807:59:59.999999'
select timediff("1997-12-31 23:59:59.000001","1997-12-30 01:01:01.000002");
timediff("1997-12-31 23:59:59.000001","1997-12-30 01:01:01.000002")
46:58:57.999999
select timediff("1997-12-30 23:59:59.000001","1997-12-31 23:59:59.000002");
timediff("1997-12-30 23:59:59.000001","1997-12-31 23:59:59.000002")
-24:00:00.000001
select timediff("1997-12-31 23:59:59.000001","23:59:59.000001");
timediff("1997-12-31 23:59:59.000001","23:59:59.000001")
NULL
select timediff("2000:01:01 00:00:00", "2000:01:01 00:00:00.000001");
timediff("2000:01:01 00:00:00", "2000:01:01 00:00:00.000001")
-00:00:00.000001
select timediff("2005-01-11 15:48:49.999999", "2005-01-11 15:48:50");
timediff("2005-01-11 15:48:49.999999", "2005-01-11 15:48:50")
-00:00:00.000001
select maketime(10,11,12);
maketime(10,11,12)
10:11:12
select maketime(25,11,12);
maketime(25,11,12)
25:11:12
select maketime(-25,11,12);
maketime(-25,11,12)
-25:11:12
select timestamp("2001-12-01", "01:01:01.999999");
timestamp("2001-12-01", "01:01:01.999999")
2001-12-01 01:01:01.999999
select timestamp("2001-13-01", "01:01:01.000001");
timestamp("2001-13-01", "01:01:01.000001")
NULL
Warnings:
Warning 1292 Incorrect datetime value: '2001-13-01'
select timestamp("2001-12-01", "25:01:01");
timestamp("2001-12-01", "25:01:01")
2001-12-02 01:01:01
select timestamp("2001-12-01 01:01:01.000100");
timestamp("2001-12-01 01:01:01.000100")
2001-12-01 01:01:01.000100
select timestamp("2001-12-01");
timestamp("2001-12-01")
2001-12-01 00:00:00
select day("1997-12-31 23:59:59.000001");
day("1997-12-31 23:59:59.000001")
31
select date("1997-12-31 23:59:59.000001");
date("1997-12-31 23:59:59.000001")
1997-12-31
select date("1997-13-31 23:59:59.000001");
date("1997-13-31 23:59:59.000001")
NULL
Warnings:
Warning 1292 Incorrect datetime value: '1997-13-31 23:59:59.000001'
select time("1997-12-31 23:59:59.000001");
time("1997-12-31 23:59:59.000001")
23:59:59.000001
select time("1997-12-31 25:59:59.000001");
time("1997-12-31 25:59:59.000001")
NULL
Warnings:
Warning 1292 Truncated incorrect time value: '1997-12-31 25:59:59.000001'
select microsecond("1997-12-31 23:59:59.000001");
microsecond("1997-12-31 23:59:59.000001")
1
create table t1
select makedate(1997,1) as f1,
addtime(cast("1997-12-31 23:59:59.000001" as datetime(6)), "1 1:1:1.000002") as f2,
addtime(cast("23:59:59.999999" as time(6)) , "1 1:1:1.000002") as f3,
timediff("1997-12-31 23:59:59.000001","1997-12-30 01:01:01.000002") as f4,
timediff("1997-12-30 23:59:59.000001","1997-12-31 23:59:59.000002") as f5,
maketime(10,11,12) as f6,
timestamp(cast("2001-12-01" as date), "01:01:01") as f7,
date("1997-12-31 23:59:59.000001") as f8,
time("1997-12-31 23:59:59.000001") as f9;
describe t1;
Field Type Null Key Default Extra
f1 date YES NULL
f2 datetime(6) YES NULL
f3 time(6) YES NULL
f4 time(6) YES NULL
f5 time(6) YES NULL
f6 time YES NULL
f7 datetime(6) YES NULL
f8 date YES NULL
f9 time(6) YES NULL
select * from t1;
f1 f2 f3 f4 f5 f6 f7 f8 f9
1997-01-01 1998-01-02 01:01:00.000003 49:01:01.000001 46:58:57.999999 -24:00:00.000001 10:11:12 2001-12-01 01:01:01.000000 1997-12-31 23:59:59.000001
create table test(t1 datetime, t2 time, t3 time, t4 datetime);
insert into test values
('2001-01-01 01:01:01', '01:01:01', null, '2001-02-01 01:01:01'),
('2001-01-01 01:01:01', '-01:01:01', '-23:59:59', "1997-12-31 23:59:59.000001"),
('1997-12-31 23:59:59.000001', '-23:59:59', '-01:01:01', '2001-01-01 01:01:01'),
('2001-01-01 01:01:01', '01:01:01', '-1 01:01:01', null),
('2001-01-01 01:01:01', '-01:01:01', '1 01:01:01', '2001-01-01 01:01:01'),
('2001-01-01 01:01:01', null, '-1 01:01:01', null),
(null, null, null, null),
('2001-01-01 01:01:01', '01:01:01', '1 01:01:01', '2001-01-01 01:01:01');
SELECT ADDTIME(t1,t2) As ttt, ADDTIME(t2, t3) As qqq from test;
ttt qqq
2001-01-01 02:02:02 NULL
2001-01-01 00:00:00 -25:01:00
1997-12-31 00:00:00 -25:01:00
2001-01-01 02:02:02 -24:00:00
2001-01-01 00:00:00 24:00:00
NULL NULL
NULL NULL
2001-01-01 02:02:02 26:02:02
SELECT TIMEDIFF(t1, t4) As ttt, TIMEDIFF(t2, t3) As qqq,
TIMEDIFF(t3, t2) As eee, TIMEDIFF(t2, t4) As rrr from test;
ttt qqq eee rrr
-744:00:00 NULL NULL NULL
838:59:59 22:58:58 -22:58:58 NULL
-838:59:59 -22:58:58 22:58:58 NULL
NULL 26:02:02 -26:02:02 NULL
00:00:00 -26:02:02 26:02:02 NULL
NULL NULL NULL NULL
NULL NULL NULL NULL
00:00:00 -24:00:00 24:00:00 NULL
Warnings:
Warning 1292 Truncated incorrect time value: '26305:01:02'
Warning 1292 Truncated incorrect time value: '-26305:01:02'
drop table t1, test;
select addtime("-01:01:01.01", "-23:59:59.1") as a;
a
-25:01:00.110000
select microsecond("1997-12-31 23:59:59.01") as a;
a
10000
select microsecond(19971231235959.01) as a;
a
10000
select date_add("1997-12-31",INTERVAL "10.09" SECOND_MICROSECOND) as a;
a
1997-12-31 00:00:10.090000
select str_to_date("2003-01-02 10:11:12.0012", "%Y-%m-%d %H:%i:%S.%f");
str_to_date("2003-01-02 10:11:12.0012", "%Y-%m-%d %H:%i:%S.%f")
2003-01-02 10:11:12.001200
select timediff('2008-09-29 20:10:10','2008-09-30 20:10:10'),time('00:00:00');
timediff('2008-09-29 20:10:10','2008-09-30 20:10:10') time('00:00:00')
-24:00:00 00:00:00
select timediff('2008-09-29 20:10:10','2008-09-30 20:10:10')>time('00:00:00');
timediff('2008-09-29 20:10:10','2008-09-30 20:10:10')>time('00:00:00')
0
select timediff('2008-09-29 20:10:10','2008-09-30 20:10:10')<time('00:00:00');
timediff('2008-09-29 20:10:10','2008-09-30 20:10:10')<time('00:00:00')
1
SELECT CAST(time('-73:42:12') AS DECIMAL);
CAST(time('-73:42:12') AS DECIMAL)
-734212
SELECT TIMEDIFF(TIME('17:00:00'),TIME('17:00:00'))=TIME('00:00:00') AS 1Eq,
TIMEDIFF(TIME('17:59:00'),TIME('17:00:00'))=TIME('00:00:00') AS 1NEq1,
TIMEDIFF(TIME('18:00:00'),TIME('17:00:00'))=TIME('00:00:00') AS 1NEq2,
TIMEDIFF(TIME('17:00:00'),TIME('17:00:00'))= '00:00:00' AS 2Eq,
TIMEDIFF(TIME('17:59:00'),TIME('17:00:00'))= '00:00:00' AS 2NEq1,
TIMEDIFF(TIME('18:00:00'),TIME('17:00:00'))= '00:00:00' AS 2NEq2,
TIMEDIFF(TIME('17:00:00'),TIME('17:00:00'))=TIME(0) AS 3Eq,
TIMEDIFF(TIME('17:59:00'),TIME('17:00:00'))=TIME(0) AS 3NEq1,
TIMEDIFF(TIME('18:00:00'),TIME('17:00:00'))=TIME(0) AS 3NEq2,
TIME(0) AS Time0, TIME('00:00:00') AS Time00, '00:00:00' AS Literal0000,
TIMEDIFF(TIME('17:59:00'),TIME('17:00:00')),
TIMEDIFF(TIME('17:00:00'),TIME('17:59:00'));
1Eq 1NEq1 1NEq2 2Eq 2NEq1 2NEq2 3Eq 3NEq1 3NEq2 Time0 Time00 Literal0000 TIMEDIFF(TIME('17:59:00'),TIME('17:00:00')) TIMEDIFF(TIME('17:00:00'),TIME('17:59:00'))
1 0 0 1 0 0 1 0 0 00:00:00 00:00:00 00:00:00 00:59:00 -00:59:00
SELECT sec_to_time(3020399)=TIME('838:59:59');
sec_to_time(3020399)=TIME('838:59:59')
1
SELECT sec_to_time(-3020399)=TIME('-838:59:59');
sec_to_time(-3020399)=TIME('-838:59:59')
1
SELECT sec_to_time(-3020399)='-838:59:59';
sec_to_time(-3020399)='-838:59:59'
1
SELECT time(sec_to_time(-3020399))=TIME('-838:59:59');
time(sec_to_time(-3020399))=TIME('-838:59:59')
1
SELECT time(sec_to_time(-3020399))=TIME('-838:59:58');
time(sec_to_time(-3020399))=TIME('-838:59:58')
0
SELECT maketime(-1,0,1)='-01:00:01';
maketime(-1,0,1)='-01:00:01'
1
SELECT TIME(maketime(-1,0,1))=CAST('-01:00:01' AS TIME);
TIME(maketime(-1,0,1))=CAST('-01:00:01' AS TIME)
1
SELECT maketime(-1,0,1)=CAST('-01:00:01' AS TIME);
maketime(-1,0,1)=CAST('-01:00:01' AS TIME)
1
SELECT maketime(1,0,1)=CAST('01:00:01' AS TIME);
maketime(1,0,1)=CAST('01:00:01' AS TIME)
1
SELECT maketime(1,0,1)=CAST('01:00:02' AS TIME);
maketime(1,0,1)=CAST('01:00:02' AS TIME)
0
|
