SQL创建计算时间函数

使用SQL函数

USE RDS
GO

--For ticket escaluation function.
insert into SystemSettings(Name,Value) VALUES('MaxBatchSize','10')

GO


/****** 对象:  UserDefinedFunction [dbo].[CalcInterVal]    脚本日期: 07/04/2008 11:46:26 ******/
IF  EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[CalcInterVal]') AND type in (N'FN', N'IF', N'TF', N'FS', N'FT'))
DROP FUNCTION [dbo].[CalcInterVal]
GO
/****** 对象:  UserDefinedFunction [dbo].[CalcInterVal]    脚本日期: 07/04/2008 11:46:26 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
IF NOT EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[CalcInterVal]') AND type in (N'FN', N'IF', N'TF', N'FS', N'FT'))
BEGIN
execute dbo.sp_executesql @statement = N'
CREATE FUNCTION [dbo].[CalcInterVal](@datepart varchar(20),@startdate varchar(50), @enddate varchar(50))
returns decimal
BEGIN
    if Datepart("minute",@startdate) > 0  OR Datepart("second",@startdate) > 0  OR Datepart("millisecond",@startdate) > 0
        BEGIN
            SET @startdate = Dateadd("hh",1,@startdate)
        END

    return DateDiff("hh",@startdate,@enddate)
END ' 
END

GO