SQL Server 2000 下日期操作的實用範例

1.顯示本月第一天

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

2.顯示本月最後一天

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.上個月的最後一天

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

4.本月的第一個星期一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.本年的最後一天

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

7.去年的最後一天

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.查詢本月的記錄

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

11.查詢本周的記錄

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

12查詢本季的記錄 註：其中:GETDATE()是獲得系統時間的函數。

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

13.擷取當月總天數:

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.擷取當前為星期幾

DATENAME(weekday, getdate())