SQLSERVER取当前月第一天和最后一天

–本月第一天：

select   dateadd(dd,-day(getdate())+1,getdate())

–本月最后一天：

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

–上个月第一天:select CONVERT(int, CONVERT(varchar(10),DATEADD(m,-1 ,dateadd(dd,-day(getdate())+1,getdate())) ,112))–上个月最后一天:SELECT CONVERT(int,convert(varchar(10),dateadd(d,-1,dateadd(m,-1,DATEADD(mm, DATEDIFF(m,0,getdate())+1, 0))),112))–本月第一日最后一日【来自wffger】select DATEADD(MM,DATEDIFF(MM,0,GETDATE()),0) AS 本月第一日,DATEADD(DAY,-1,DATEADD(MM,DATEDIFF(MM,0,GETDATE())+1,0)) 本月最后一日;

附录:http://www.w3school.com.cn/sql/sql_dates.asp