http://www.cnblogs.com/zeroone/archive/2010/05/05/1727659.html
UNIX_TIMESTAMP()
UNIX_TIMESTAMP(date)
返回一个Unix时间戳(从‘1970-01-01 00:00:00‘GMT开始的秒数,date默认值为当前时间)
mysql> select UNIX_TIMESTAMP();
-> 882226357
mysql> select UNIX_TIMESTAMP(‘1997-10-04 22:23:00‘);
-> 875996580
FROM_UNIXTIME(unix_timestamp)
mysql时间函数,总是记不住,总是查。,布布扣,bubuko.com
原文地址:http://www.cnblogs.com/jvava/p/3861152.html