日期相加的查询SQL语句这是一款讲mssql access的日期相加的sql语句,在它们中对数据库日期操作提供了大量的函数,今天我们日期相加就利用了Dateadd函数来实例。
日期相加的查询sql语句
这是一款讲mssql access的日期相加的sql语句,在它们中对日期操作提供了大量的函数,今天我们日期相加就利用了dateadd函数来实例。
*/
//方法一
set nocount on
declare @kp table([id] int,[ys] int,[syrq] datetime)
insert @kp
select 1,2,'2008-08-08' union all
select 2,3,'2008-09-01' union all
select 3,33,'2008-08-11'
select id,dateadd(month,ys,syrq) as syrq from @kp
//方法二 简单查询语句
select dateadd(month,cast(ys as int),syrq) as 新日期 from kp
//方法三dateadd函数日期相加
dateadd(d,5,"2008-08-08")
dateadd(d,5,"2008-08-08")
sqlstr="select * from 表 where 时间字段=dateadd(d,5,'2008-08-08')"
select dateadd(d,5,cast('2008-08-08'as datetime))
select cast('2008-08-08'as datetime)2008-08-13 00:00:00.000
2008-08-08 00:00:00.000
看个日期相加sql实例
use pubs
go
select dateadd(day, 21, pubdate) as timeframe
from titles
go
/*
dateadd函数 返回 返回包含一个日期的 variant (date),这一日期还加上了一段时间间隔。 语法 dateadd(interval, number, date) dateadd 函数语法中有下列命名参数: 部分 描述 interval 必要。字符串表达式,是所要加上去的时间间隔。 number 必要。数值表达式,是要加上的时间间隔的数目。其数值可以为正数(得到未来的日期),也可以为负数(得到过去的日期)。 date 必要。variant (date) 或表示日期的文字,这一日期还加上了时间间隔。 设置 interval 参数具有以下设定值: 设置 描述 yyyy 年 q 季 m 月 y 一年的日数 d 日 w 一周的日数 ww 周 hh 时 n 分钟 s 秒
*/

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