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'