1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
|
set time_zone='+03:00';
set timestamp=unix_timestamp('2011-01-01 01:01:01.123456');
select sec_to_time(12345), sec_to_time(12345.6789), sec_to_time(1234567e-2);
sec_to_time(12345) 03:25:45
sec_to_time(12345.6789) 03:25:45.6789
sec_to_time(1234567e-2) 03:25:45.670000
select now(), curtime(0), utc_timestamp(1), utc_time(2), current_time(3),
current_timestamp(4), localtime(5), localtimestamp(6), time_to_sec('12:34:56'),
time_to_sec('12:34:56.789');
now() 2011-01-01 01:01:01
curtime(0) 01:01:01
utc_timestamp(1) 2010-12-31 22:01:01.1
utc_time(2) 22:01:01.12
current_time(3) 01:01:01.123
current_timestamp(4) 2011-01-01 01:01:01.1234
localtime(5) 2011-01-01 01:01:01.12345
localtimestamp(6) 2011-01-01 01:01:01.123456
time_to_sec('12:34:56') 45296
time_to_sec('12:34:56.789') 45296.789
select sec_to_time(time_to_sec('1:2:3')), sec_to_time(time_to_sec('2:3:4.567890'));
sec_to_time(time_to_sec('1:2:3')) 01:02:03
sec_to_time(time_to_sec('2:3:4.567890')) 02:03:04.567890
select time_to_sec(sec_to_time(11111)), time_to_sec(sec_to_time(11111.22222));
time_to_sec(sec_to_time(11111)) 11111
time_to_sec(sec_to_time(11111.22222)) 11111.22222
select current_timestamp(7);
ERROR 42000: Too big precision 7 specified for 'now'. Maximum is 6.
select curtime(7);
ERROR 42000: Too big precision 7 specified for 'curtime'. Maximum is 6.
drop table if exists t1;
create table t1 select sec_to_time(12345), sec_to_time(12345.6789),
sec_to_time(1234567e-2), now(), curtime(0),
utc_timestamp(1), utc_time(2), current_time(3),
current_timestamp(4), localtime(5), localtimestamp(6),
time_to_sec(123456), time_to_sec('12:34:56.789');
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`sec_to_time(12345)` time DEFAULT NULL,
`sec_to_time(12345.6789)` time(4) DEFAULT NULL,
`sec_to_time(1234567e-2)` time(6) DEFAULT NULL,
`now()` datetime NOT NULL,
`curtime(0)` time NOT NULL,
`utc_timestamp(1)` datetime(1) NOT NULL,
`utc_time(2)` time(2) NOT NULL,
`current_time(3)` time(3) NOT NULL,
`current_timestamp(4)` datetime(4) NOT NULL,
`localtime(5)` datetime(5) NOT NULL,
`localtimestamp(6)` datetime(6) NOT NULL,
`time_to_sec(123456)` bigint(17) DEFAULT NULL,
`time_to_sec('12:34:56.789')` decimal(19,3) DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
select * from t1;
sec_to_time(12345) 03:25:45
sec_to_time(12345.6789) 03:25:45.6789
sec_to_time(1234567e-2) 03:25:45.670000
now() 2011-01-01 01:01:01
curtime(0) 01:01:01
utc_timestamp(1) 2010-12-31 22:01:01.1
utc_time(2) 22:01:01.12
current_time(3) 01:01:01.123
current_timestamp(4) 2011-01-01 01:01:01.1234
localtime(5) 2011-01-01 01:01:01.12345
localtimestamp(6) 2011-01-01 01:01:01.123456
time_to_sec(123456) 45296
time_to_sec('12:34:56.789') 45296.789
drop table t1;
select unix_timestamp('2011-01-01 01:01:01'), unix_timestamp('2011-01-01 01:01:01.123456'), unix_timestamp(cast('2011-01-01 01:01:01.123456' as datetime(0))), unix_timestamp(cast('2011-01-01 01:01:01.123456' as datetime(4)));;
unix_timestamp('2011-01-01 01:01:01') 1293832861
unix_timestamp('2011-01-01 01:01:01.123456') 1293832861.123456
unix_timestamp(cast('2011-01-01 01:01:01.123456' as datetime(0))) 1293832861
unix_timestamp(cast('2011-01-01 01:01:01.123456' as datetime(4))) 1293832861.1234
select from_unixtime(unix_timestamp('2011/1/1 1:1:1')), from_unixtime(unix_timestamp('2011/1/1 1:1:1.123456')), from_unixtime(unix_timestamp(cast('2011/1/1 1:1:1.123456' as datetime(0)))), from_unixtime(unix_timestamp(cast('2011/1/1 1:1:1.123456' as datetime(4))));;
from_unixtime(unix_timestamp('2011/1/1 1:1:1')) 2011-01-01 01:01:01
from_unixtime(unix_timestamp('2011/1/1 1:1:1.123456')) 2011-01-01 01:01:01.123456
from_unixtime(unix_timestamp(cast('2011/1/1 1:1:1.123456' as datetime(0)))) 2011-01-01 01:01:01
from_unixtime(unix_timestamp(cast('2011/1/1 1:1:1.123456' as datetime(4)))) 2011-01-01 01:01:01.1234
select sec_to_time(3020399.99999), sec_to_time(3020399.999999), sec_to_time(3020399.9999999);
sec_to_time(3020399.99999) sec_to_time(3020399.999999) sec_to_time(3020399.9999999)
838:59:59.99999 838:59:59.999999 838:59:59.999999
select sec_to_time(-3020399.99999), sec_to_time(-3020399.999999), sec_to_time(-3020399.9999999);
sec_to_time(-3020399.99999) sec_to_time(-3020399.999999) sec_to_time(-3020399.9999999)
-838:59:59.99999 -838:59:59.999999 -838:59:59.999999
select 20010101000203.000000004 + interval 1 day;
20010101000203.000000004 + interval 1 day
2001-01-02 00:02:03.000000
select 20010101000203.4 + interval 1 day;
20010101000203.4 + interval 1 day
2001-01-02 00:02:03.4
set @a=cast('2011-01-02 12:13:14' as datetime);
select @a + interval 1 minute;
@a + interval 1 minute
2011-01-02 12:14:14
select @a + interval 10 microsecond;
@a + interval 10 microsecond
2011-01-02 12:13:14.000010
select @a + interval 10 microsecond + interval 999990 microsecond;
@a + interval 10 microsecond + interval 999990 microsecond
2011-01-02 12:13:15.000000
set @a='2011-01-02 12:13:14.123456';
create table t1 select CAST(@a AS DATETIME) as dauto,
CAST(@a AS DATETIME(0)) as d0,
CAST(@a AS DATETIME(1)) as d1,
CAST(@a AS DATETIME(2)) as d2,
CAST(@a AS DATETIME(3)) as d3,
CAST(@a AS DATETIME(4)) as d4,
CAST(@a AS DATETIME(5)) as d5,
CAST(@a AS DATETIME(6)) as d6,
CAST(@a AS TIME) as tauto,
CAST(@a AS TIME(0)) as t0,
CAST(@a AS TIME(1)) as t1,
CAST(@a AS TIME(2)) as t2,
CAST(@a AS TIME(3)) as t3,
CAST(@a AS TIME(4)) as t4,
CAST(@a AS TIME(5)) as t5,
CAST(@a AS TIME(6)) as t6;
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`dauto` datetime DEFAULT NULL,
`d0` datetime DEFAULT NULL,
`d1` datetime(1) DEFAULT NULL,
`d2` datetime(2) DEFAULT NULL,
`d3` datetime(3) DEFAULT NULL,
`d4` datetime(4) DEFAULT NULL,
`d5` datetime(5) DEFAULT NULL,
`d6` datetime(6) DEFAULT NULL,
`tauto` time DEFAULT NULL,
`t0` time DEFAULT NULL,
`t1` time(1) DEFAULT NULL,
`t2` time(2) DEFAULT NULL,
`t3` time(3) DEFAULT NULL,
`t4` time(4) DEFAULT NULL,
`t5` time(5) DEFAULT NULL,
`t6` time(6) DEFAULT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
select * from t1;
dauto 2011-01-02 12:13:14
d0 2011-01-02 12:13:14
d1 2011-01-02 12:13:14.1
d2 2011-01-02 12:13:14.12
d3 2011-01-02 12:13:14.123
d4 2011-01-02 12:13:14.1234
d5 2011-01-02 12:13:14.12345
d6 2011-01-02 12:13:14.123456
tauto 12:13:14
t0 12:13:14
t1 12:13:14.1
t2 12:13:14.12
t3 12:13:14.123
t4 12:13:14.1234
t5 12:13:14.12345
t6 12:13:14.123456
drop table t1;
explain extended select cast(cast(@a as datetime(4)) as time(0));
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 cast(cast((@`a`) as datetime(4)) as time) AS `cast(cast(@a as datetime(4)) as time(0))`
select cast(cast(@a as time(2)) as time(6));
cast(cast(@a as time(2)) as time(6))
12:13:14.120000
select CAST(@a AS DATETIME(7));
ERROR 42000: Too big precision 7 specified for '(@`a`)'. Maximum is 6.
SELECT CONVERT_TZ('2011-01-02 12:00:00', '+00:00', '+03:00');
CONVERT_TZ('2011-01-02 12:00:00', '+00:00', '+03:00')
2011-01-02 15:00:00
SELECT CONVERT_TZ('2011-01-02 12:00:00.123', '+00:00', '+03:00');
CONVERT_TZ('2011-01-02 12:00:00.123', '+00:00', '+03:00')
2011-01-02 15:00:00.123
SELECT CONVERT_TZ('2011-01-02 12:00:00.123456', '+00:00', '+03:00');
CONVERT_TZ('2011-01-02 12:00:00.123456', '+00:00', '+03:00')
2011-01-02 15:00:00.123456
SELECT CONVERT_TZ(CAST('2010-10-10 10:10:10.123456' AS DATETIME(4)), '+00:00', '+03:00');
CONVERT_TZ(CAST('2010-10-10 10:10:10.123456' AS DATETIME(4)), '+00:00', '+03:00')
2010-10-10 13:10:10.1234
create table t1 (a varchar(200));
insert t1 values (now(6));
select * from t1;
a
2011-01-01 01:01:01.123456
drop table t1;
create table t1 (f1 timestamp(6));
insert into t1 values ('2002-07-15 21:00:00');
select time(f1) from t1;
time(f1)
21:00:00.000000
select time(f1) from t1 union all select time(f1 + interval 1 second) from t1;
time(f1)
21:00:00.000000
21:00:01.000000
alter table t1 modify f1 timestamp;
select time(f1) from t1;
time(f1)
21:00:00
select time(f1) from t1 union all select time(f1 + interval 1 second) from t1;
time(f1)
21:00:00
21:00:01
alter table t1 modify f1 varchar(100);
select time(f1) from t1;
time(f1)
21:00:00.000000
select time(f1) from t1 union all select time(f1 + interval 1 second) from t1;
time(f1)
21:00:00.000000
21:00:01.000000
drop table t1;
|
