SQL时间相关 - SQL日期,时间比较
SQL Server 中时间比较 例子: select count(*) from table where DATEDIFF ([second], '2004-09-18 00:00:18', '2004-09-18 00:00:19') > 0 说明 select DATEDIFF(day, time1 , time2) 对应示例语句如下 select DATEDIFF(day, '2010-07-23 0:41:18', '2010-07-23 23:41:18') time1 > time2 为负数; time1 < time2 为正数; [day] :只会比较 2010-07-23 忽略 0:41:18' 其他同理 以下分别: 年: SELECT DATEDIFF([year],time1 , time2) 返回值: -6 ,说明是后减前 与 mysql 相反的。 月: SELECT DATEDIFF([month], time1 , time2) 天: SELECT DATEDIFF([day], time1 , time2) 小时: SELECT DATEDIFF([hour], time1 , time2) 秒: SELECT DATEDIFF([second], time1 , time2)