标签:lan 返回 比较 span bsp 忽略 from 负数 select
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)
标签:lan 返回 比较 span bsp 忽略 from 负数 select
原文地址:http://www.cnblogs.com/ANDY_ZHANG/p/7955961.html