SQL Server 2008中的格式化日期

让我们来创建dbo.format_date 函数,如下所示。

  

      /****** Object: UserDefinedFunction [dbo].[format_date]

  Script Date: 05/12/2009 23:19:35 ******/

  IF EXISTS (SELECT * FROM sys.objects

  WHERE object_id = OBJECT_ID(N'[dbo].[format_date]')

  AND type in (N'FN', N'IF', N'TF', N'FS', N'FT'))

  DROP FUNCTION [dbo].[format_date]

  GO

  /****** Object: UserDefinedFunction [dbo].[format_date]

  Script Date: 05/12/2009 23:19:18 ******/

  SET ANSI_NULLS ON

  GO

  SET QUOTED_IDENTIFIER ON

  GO

  SET CONCAT_NULL_YIELDS_NULL OFF

  go

  CREATE function [dbo].[format_date]

  (@inputdate datetime ,@format varchar(500))

  returns varchar(500)

  as

  begin

  declare @year varchar(4) --YYYY

  declare @shortyear varchar(4) --Yr

  declare @quarter varchar(4) --QQ

  declare @month varchar(2) --MM

  declare @week varchar(2) --WW

  declare @day varchar(2) --DD

  declare @24hours varchar(2) --24HH

  declare @12hours varchar(2) --HH

  declare @minutes varchar(2) --MI

  declare @seconds varchar(2) --SS

  declare @milliseconds varchar(3) --MS

  declare @microseconds varchar(6) --MCS

  declare @nanoseconds varchar(9) --NS

  declare @dayname varchar(15) --DAY

  declare @monthname varchar(15) --MONTH

  declare @shortmonthname varchar(15) --MON

  declare @AMPM varchar(15) --AMPM

  declare @TZ varchar(15) --TZ

  declare @UNIXPOSIX varchar(15) --UNIXPOSIX

  --UCASE

  --LCASE

  declare @formatteddate varchar(500)

  --Assign current date and time to

  if (@inputdate is NULL or @inputdate ='')

  begin

  set @inputdate = getdate()

  end

  if (@format is NULL or @format ='')

  begin

  set @format ='YYYY-MM-DD 12HH:MI:SS AMPM'

  end

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