---sql server declare @date datetimeset @date='2012-02-03'--getdate()--本月第一天SELECT DATEADD(mm, DATEDIFF(mm,0,@date), 0)--本月最后一天SELECT dateadd(ms,-3,DATEADD(mm, DATEDIFF(m,0,@date)+1, 0))---有個月多少天函數if exists (select * fro

---sql server declare @date datetime set @date='2012-02-03'--getdate() --本月第一天 SELECT DATEADD(mm, DATEDIFF(mm,0,@date), 0) --本月最后一天 SELECT dateadd(ms,-3,DATEADD(mm, DATEDIFF(m,0,@date)+1, 0)) ---有個月多少天函數 if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[GetAMonthHowNumber]') and xtype in (N'FN', N'IF', N'TF')) drop function [dbo].[GetAMonthHowNumber] GO CREATE function GetAMonthHowNumber ( @date datetime ) returns int as begin declare @int int select @int=datediff(dd , @date , dateadd(mm, 1, @date)) return @int end GO -- select [dbo].[GetAMonthHowNumber] (getdate()) AS '月天數' ---計算當月周六，周日有多少天 if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[GetAMonthStatSunNumber]') and xtype in (N'FN', N'IF', N'TF')) drop function [dbo].[GetAMonthStatSunNumber] GO CREATE function GetAMonthStatSunNumber ( @date datetime ) returns int as begin declare @Sdate datetime ,@Edate datetime SELECT @Sdate=DATEADD(mm, DATEDIFF(mm,0,@date), 0) SELECT @Edate=dateadd(ms,-3,DATEADD(mm, DATEDIFF(m,0,@date)+1, 0)) --set @Sdate='2013-05-01' --set @Edate='2013-05-31' declare @aa table (strdate datetime) declare @i int set @i=datediff(day,@Sdate,@Edate) while(@i>=0) begin insert @aa values (dateadd(day,@i,@Sdate)) set @i=@i-1 end select @i= count(*) from @aa where datepart(weekday,strdate) in (1,7) --not in (1,7) return @i end go -- select [dbo].[GetAMonthStatSunNumber] (getdate()) AS '雙休日天數' --計算當月除周六，服务器租用，周日有多少天，虚拟主机，也是有多少工作日 if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[GetAMonthWorkDayNumber]') and xtype in (N'FN', N'IF', N'TF')) drop function [dbo].[GetAMonthWorkDayNumber] GO CREATE function GetAMonthWorkDayNumber ( @date datetime ) returns int as begin declare @Sdate datetime ,@Edate datetime SELECT @Sdate=DATEADD(mm, DATEDIFF(mm,0,@date), 0) SELECT @Edate=dateadd(ms,-3,DATEADD(mm, DATEDIFF(m,0,@date)+1, 0)) --set @Sdate='2013-05-01' --set @Edate='2013-05-31' declare @aa table (strdate datetime) declare @i int set @i=datediff(day,@Sdate,@Edate) while(@i>=0) begin insert @aa values (dateadd(day,@i,@Sdate)) set @i=@i-1 end select @i= count(*) from @aa where datepart(weekday,strdate) not in (1,7) --not in (1,7) return @i end go --- select [dbo].[GetAMonthWorkDayNumber] (getdate()) as '工作日天數' ，虚拟主机