mysql>select current_timestamp, current_timestamp()
+---------------------+---------------------+
| current_timestamp | current_timestamp() |
+---------------------+---------------------+
| 2008-08-09 23:22:24 | 2008-08-09 23:22:24 |
+---------------------+---------------------+
2. MySQL (Unix 时间戳、日期)转换函数:
unix_timestamp(),
unix_timestamp(date),
from_unixtime(unix_timestamp),
from_unixtime(unix_timestamp,format)
下面是示例:
select unix_timestamp()-- 1218290027
select unix_timestamp('2008-08-08')-- 1218124800
select unix_timestamp('2008-08-08 12:30:00')-- 1218169800
select from_unixtime(1218290027)-- '2008-08-09 21:53:47'
select from_unixtime(1218124800)-- '2008-08-08 00:00:00'
select from_unixtime(1218169800)-- '2008-08-08 12:30:00'
select from_unixtime(1218169800, '%Y %D %M %h:%i:%s %x')-- '2008 8th August 12:30:00 2008'
3. MySQL 时间戳(timestamp)转换、增、减函数:
timestamp(date) -- date to timestamp
timestamp(dt,time) -- dt + time
timestampadd(unit,interval,datetime_expr) --
timestampdiff(unit,datetime_expr1,datetime_expr2) --
请看示例部分:
select timestamp('2008-08-08')-- 2008-08-08 00:00:00
select timestamp('2008-08-08 08:00:00', '01:01:01')-- 2008-08-08 09:01:01
select timestamp('2008-08-08 08:00:00', '10 01:01:01')-- 2008-08-18 09:01:01
select timestampadd(day, 1, '2008-08-08 08:00:00')-- 2008-08-09 08:00:00
select date_add('2008-08-08 08:00:00', interval 1 day)-- 2008-08-09 08:00:00
MySQL timestampadd() 函数类似于 date_add()。
select timestampdiff(year,'2002-05-01','2001-01-01')-- -1
select timestampdiff(day ,'2002-05-01','2001-01-01')-- -485
select timestampdiff(hour,'2008-08-08 12:00:00','2008-08-08 00:00:00')-- -12
select datediff('2008-08-08 12:00:00', '2008-08-01 00:00:00')-- 7
MySQL timestampdiff() 函数就比 datediff() 功能强多了,datediff() 只能计算两个日期(date)之间相差的天数。
您好,MySQL中可以使用函数NOW()来获取当前时间,但是它会返回一个带有冒号的时间字符串,例如:2020-09-12 12:34:56。如果您想要去掉冒号,可以使用MySQL的REPLACE函数,它可以把字符串中的某个字符替换成另一个字符,例如:REPLACE(NOW(), ':', ''),这样就可以把冒号替换成空字符,从而获取不带冒号的当前时间字符串。欢迎分享,转载请注明来源:内存溢出
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