mysql 获取系统时间及其格式

mysql>select   now();

+---------------------+ |

now()               | +---------------------+

| 2011-06-11 12:00:54 | +---------------------+ 1 row in set (0.00 sec)

 

 

mysql>select   sysdate();

+---------------------+ | sysdate()           | +---------------------+ |2011-06-11 12:00:54 | +---------------------+ 1 row in set (0.00 sec)

 

 

mysql>select   curdate(); +------------+ | curdate()  | +------------+ |2011-06-11 | +------------+ 1 row in set (0.00 sec)

 

 

mysql> select   current_date; +--------------+ | current_date | +--------------+ |2011-06-11   | +--------------+ 1 row in set
(0.00 sec)

 

 

mysql> select   curtime(); +-----------+ | curtime() | +-----------+ | 12:00:54  | +-----------+ 1 row in set (0.00 sec)

 

 

 

mysql>select   current_time; +--------------+ | current_time | +--------------+ |12:00:54     | +--------------+ 1 row in set (0.00
sec)

 

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 ===得到当前时间的unix时间值

将具体时间来转换成timestamp

select unix_timestamp('2008-08-08'); -- 1218124800select unix_timestamp('2008-08-08 12:30:00'); -- 1218169800

将timestamp来转换成具体时间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'