mysql 日期转换sql函数

mysql提供了两个函数:

from_unixtime(time_stamp)   ->  将时间戳转换为日期

unix_timestamp(date)             ->  将指定的日期或者日期字符串转换为时间戳

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[plain] select from_unixtime(1382544000);  +---------------------------+  | from_unixtime(1382544000) |  +---------------------------+  | 2013-10-24 00:00:00       |  +---------------------------+  如: unix_timestamp(date)    [plain] select unix_timestamp(date('2013-10-24'));  +------------------------------------+  | unix_timestamp(date('2013-10-24')) |  +------------------------------------+  |                         1382544000 |  +------------------------------------+     如果要查询当天的订单的记录: [plain] select count(*) from b_order Where  date_format(from_unixtime(create_time),'%Y-%m-%d') = date_format(now(),'%Y-%m-%d')     也可以这样: [plain] select count(*) from b_order Where  create_time >= unix_timestamp('2013-10-24 00:00:00') and create_time <=  unix_timestamp('2013-10-24 23:59:59') ;