dark868的专栏

时间差函数（TIMESTAMPDIFF、DATEDIFF） --0 select datediff(now(), now()); --2 select datediff('2015-04-22 23:59:00', '2015-04-20 00:00:00'); --2 select datediff('2015-04-22 00:00:00', '2015-04-20 23:59:00'); --1 select TIMESTAMPDIFF(DAY, '2015-04-20 23:59:00',