sql server对时间(月、周)的操作转载

---上个月月初第一天

select CONVERT(varchar(12) , DATEADD(mm,DATEDIFF(mm,0,dateadd(mm,-1,getdate())),0), 112 )

---上个月月末最后一天

select CONVERT(varchar(12),dateadd(ms,-3,DATEADD(mm,DATEDIFF(m,0,getdate()),0)), 112 )

1.显示本月第一天

SELECT DATEADD(mm,DATEDIFF(mm,0,getdate()),0) select convert(datetime,convert(varchar(8),getdate(), 120)+'01',120)

2.显示本月最后一天

select dateadd(day,-1,convert(datetime,convert (varchar(8),dateadd(month,1,getdate()),120)+'01',120)) SELECT dateadd(ms,-3,DATEADD(mm,DATEDIFF(m,0,getdate())+1,0))

3.上个月的最后一天

SELECT dateadd(ms,-3,DATEADD(mm,DATEDIFF(mm,0,getdate()),0))

4.本月的第一个星期一i

select DATEADD(wk,DATEDIFF(wk,0, dateadd(dd,6-datepart( day,getdate()),getdate())),0)

5.本年的第一天

SELECT DATEADD(yy,DATEDIFF(yy,0,getdate()),0)

6.本年的最后一天

SELECT dateadd(ms,-3,DATEADD(yy,DATEDIFF(yy,0,getdate())+1,0))

7.去年的最后一天

SELECT dateadd(ms,-3,DATEADD(yy,DATEDIFF(yy,0,getdate()),0))

8.本季度的第一天

SELECT DATEADD(qq,DATEDIFF(qq,0,getdate()),0)

9.本周的星期一

SELECT DATEADD(wk,DATEDIFF(wk,0,getdate()),0)

10.查询本月的记录

select * from tableName where DATEPART(mm, theDate) =DATEPART(mm, GETDATE()) and DATEPART(yy, theDate) = DATEPART(yy, GETDATE())

11.查询本周的记录

select * from tableName where DATEPART(wk, theDate) = DATEPART (wk, GETDATE()) and DATEPART(yy, theDate) = DATEPART(yy, GETDATE())

12查询本季的记录 注：其中:GETDATE()是获得系统时间的函数。

select * from tableName where DATEPART(qq, theDate) = DATEPART (qq, GETDATE()) and DATEPART(yy, theDate) = DATEPART(yy, GETDATE())

13.获取当月总天数:

select DATEDIFF(dd,getdate(),DATEADD (mm, 1, getdate())) select datediff(day, dateadd(mm, datediff(mm,'',getdate()), ''), dateadd(mm, datediff(mm,'',getdate()), '1900-02-01'))

14.获取当前为星期几

DATENAME(weekday, getdate())

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1. select CONVERT(varchar(12) , getdate(), 101 )

    12/28/2007

2. select CONVERT(varchar(12) , getdate(), 102 )

    2007.12.28

3. select CONVERT(varchar(12) , getdate(), 103 )

    28/12/2007

4. select CONVERT(varchar(12) , getdate(), 104 )

    28.12.2007

5. select CONVERT(varchar(12) , getdate(), 105 )

    28-12-2007

6. select CONVERT(varchar(12) , getdate(), 106 )

    28 12 2007

7. select CONVERT(varchar(12) , getdate(), 107 )

    12 28, 2007

8. select CONVERT(varchar(12) , getdate(), 108 )

    10:06:33

9. select CONVERT(varchar(12) , getdate(), 109 )

    12 28 2007 1

10.select CONVERT(varchar(12) , getdate(), 110 )

    12-28-2007

11.select CONVERT(varchar(12) , getdate(), 111 )

    2007/12/28

12.select CONVERT(varchar(12) , getdate(), 112 )

    20071228

13.select CONVERT(varchar(12) , getdate(), 113 )

    28 12 2007 1

14.select CONVERT(varchar(12) , getdate(), 114 )

    10:07:36:623

15.select CONVERT(varchar, getdate(), 120 )

    2007-12-28 10:08:56

16.select replace(replace(replace(CONVERT(varchar, getdate(), 120 ),'-',''),' ',''),':','')

    20071228101012