SQL创建计算时间函数

 1 USE RDS
 2 GO
 3 
 4 --For ticket escaluation function.
 5 insert into SystemSettings(Name,Value) VALUES(‘MaxBatchSize‘,‘10‘)
 6 
 7 GO
 8 
 9 
10 /****** 对象:  UserDefinedFunction [dbo].[CalcInterVal]    脚本日期: 07/04/2008 11:46:26 ******/
11 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‘))
12 DROP FUNCTION [dbo].[CalcInterVal]
13 GO
14 /****** 对象:  UserDefinedFunction [dbo].[CalcInterVal]    脚本日期: 07/04/2008 11:46:26 ******/
15 SET ANSI_NULLS ON
16 GO
17 SET QUOTED_IDENTIFIER ON
18 GO
19 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‘))
20 BEGIN
21 execute dbo.sp_executesql @statement = N‘
22 CREATE FUNCTION [dbo].[CalcInterVal](@datepart varchar(20),@startdate varchar(50), @enddate varchar(50))
23 returns decimal
24 BEGIN
25     if Datepart("minute",@startdate) > 0  OR Datepart("second",@startdate) > 0  OR Datepart("millisecond",@startdate) > 0
26         BEGIN
27             SET @startdate = Dateadd("hh",1,@startdate)
28         END
29 
30     return DateDiff("hh",@startdate,@enddate)
31 END ‘ 
32 END
33 
34 GO