SQL Server 扩展一个支持类似。net 时间格式化的标量函数~

IF EXISTS(SELECT TOP 1 * FROM sys.objects WHERE name=N'uF_DateFormat' AND [type]='FN')
    DROP FUNCTION uF_DateFormat
GO

SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
-- =============================================
-- Author:        hehai
-- Create date: 2015-11-27 16:06:43
-- Description:    对指定的时间进行指定格式的转换

/*
    @formatString
    年 份:yy / yyyy (15/2015)
    月 份: mm/MM     (1/01 11/11)
    日 期:d/dd/D/DD (1/01 10/10)
    小 时:h/hh/H/HH (6AM/06AM/6/06)        h表示按照12时制格式化, H表示按照24时制格式化,若为h/hh时间最后有[AM 或 PM]
                     (6PM/06PM/18/18)
    -------------------------------------------
    分 钟:mi/mz     (10/10 1/01)
    秒 钟:si/ss     (1/01 10/10)
    秒 钟:mss/ms     (0/10/999  000/010/999)
*/
-- =============================================
CREATE FUNCTION uF_DateFormat
(    
    @date DATETIME,                            -- 指定转换时间
    @formatString NVARCHAR(30),                -- 指定需要转换格式
    @defaultIfdateIsNull NVARCHAR(30)        -- 返回指定时间的指定转换格式结果字符
)
RETURNS NVARCHAR(30)
AS
BEGIN
    DECLARE @R NVARCHAR(30),@T NVARCHAR(5),@C CHAR(2)=N'AM'
    DECLARE @Y INT,@M TINYINT,@D TINYINT,@H TINYINT,@MI TINYINT,@SS TINYINT,@MS INT
    
    SET @Y=DATEPART([YEAR],@date)
    SET @M=DATEPART([MONTH],@date)
    SET @D=DATEPART([DAY],@date)
    SET @H=DATEPART([HOUR],@date)
    SET @MI=DATEPART([MINUTE],@date)
    SET @SS=DATEPART([SECOND],@date)
    SET @MS=DATEPART([MILLISECOND],@date)

    SET @R=@formatString

    SET @R=REPLACE(@R,N'yyyy',CAST(@Y AS NVARCHAR(4)))
    SET @R=REPLACE(@R,N'YYYY',CAST(@Y AS NVARCHAR(4)))
    SET @R=REPLACE(@R,N'yy',RIGHT( CAST(@Y AS NVARCHAR(4)),2))
    SET @R=REPLACE(@R,N'YY',RIGHT( CAST(@Y AS NVARCHAR(4)),2))

    
    SET @T=CAST(@M AS NVARCHAR(2))
    IF @M<10 SET @T=N'0'+CAST(@M AS NVARCHAR(2))
    SET @R=REPLACE(@R,N'MM',@T)
    SET @R=REPLACE(@R,N'mm',@T)


    SET @T=CAST(@D AS NVARCHAR(2))
    IF @D<10 SET @T=N'0'+CAST(@D AS NVARCHAR(2))
    SET @R=REPLACE(@R,N'dd',@T)
    SET @R=REPLACE(@R,N'DD',@T)
    SET @R=REPLACE(@R,N'dd',@T)
    SET @R=REPLACE(@R,N'd',@T)


    SET @T=CAST(@H AS NVARCHAR(2))
    IF @H<10 SET @T=N'0'+CAST(@H AS NVARCHAR(2))
    SET @R=REPLACE(@R,N'HH',@T)
    SET @R=REPLACE(@R,N'H',@T)
    
    -- 12小时制 --
    SET @T=CAST(@H AS NVARCHAR(2))
    IF @H>=12
    BEGIN
        SET @C='PM'
        SET @H=24-12
        SET @T=CAST(@H AS NVARCHAR(2))    
    END
    SET @R=REPLACE(@R,N'hh',@T)
    SET @R=REPLACE(@R,N'h',@T)


    SET @T=CAST(@MI AS NVARCHAR(2))
    IF @MI<10 SET @T=N'0'+CAST(@MI AS NVARCHAR(2))
    SET @R=REPLACE(@R,N'mi',@T)
    


    SET @T=CAST(@SS AS NVARCHAR(2))
    IF @SS<10 SET @T=N'0'+CAST(@SS AS NVARCHAR(2))
    SET @R=REPLACE(@R,N'ss',@T)
    SET @R=REPLACE(@R,N'si',@T)

    SET @T=CAST(@MS AS NVARCHAR(3))
    IF @MS>=0 AND @MS<10 SET @T=N'00'+CAST(@MS AS NVARCHAR(1))
    IF @MS>=10 AND @MS<100 SET @T=N'0'+CAST(@MS AS NVARCHAR(2))
    SET @R=REPLACE(@R,N'ms',@T)
    SET @R=REPLACE(@R,N'mss',@T)
        
    RETURN @R
END
GO

-- 年月日
SELECT dbo.uF_DateFormat(getdate(),'yyyyMMdd',NULL)
SELECT dbo.uF_DateFormat(getdate(),'yyyy/MM/dd',NULL)
SELECT dbo.uF_DateFormat(getdate(),'yyyy-MM-dd',NULL)
SELECT dbo.uF_DateFormat(getdate(),'yyyy年MM月dd日',NULL)

-- 年月日时分秒
SELECT dbo.uF_DateFormat(getdate(),'yyyyMMdd HH:mi:ss',NULL)

-- 年月日时分秒 毫秒
SELECT dbo.uF_DateFormat(getdate(),'yyyy-MM-dd HH:mi:ss.ms',NULL)

 

posted on 2015-11-27 17:31  oceanho  阅读(224)  评论(0编辑  收藏  举报

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