SQLServer编写自己的切分函数 SPLIT和带排序的切割函数 SPLITSort

一、SPLIT函数

CREATE FUNCTION [dbo].[SPLIT] ( @StringToSplit VARCHAR(MAX),@SplitDelim VARCHAR(10) )
RETURNS
 @SplitStringTable TABLE (KpiCode nvarchar(MAX) NOT NULL)
AS
BEGIN

 DECLARE @SplitEndPos int
 DECLARE @SplitValue nvarchar(MAX)
 DECLARE @SplitStartPos int = 1

SET @SplitEndPos = CHARINDEX(@SplitDelim, @StringToSplit, @SplitStartPos)

WHILE @SplitEndPos > 0
BEGIN
    SET @SplitValue = SUBSTRING(@StringToSplit, @SplitStartPos, (@SplitEndPos - @SplitStartPos))
    INSERT @SplitStringTable (KpiCode) VALUES (@SplitValue)
    SET @SplitStartPos = @SplitEndPos + 1
    SET @SplitEndPos = CHARINDEX(@SplitDelim, @StringToSplit, @SplitStartPos)
END

SET @SplitValue = SUBSTRING(@StringToSplit, @SplitStartPos, 2147483647)
INSERT @SplitStringTable (KpiCode) VALUES(@SplitValue)


 RETURN
END

示例：

select * from [dbo].[SPLIT]('a,b,c',',')

二、SPLITSort

CREATE FUNCTION [dbo].[SPLITSort] ( @StringToSplit VARCHAR(MAX),@SplitDelim VARCHAR(10) )
RETURNS
 @SplitStringTable TABLE (KpiCode nvarchar(MAX) NOT NULL,Sort int)
AS
BEGIN

 DECLARE @SplitEndPos int
 DECLARE @SplitValue nvarchar(MAX)
 DECLARE @SplitStartPos int = 1
 
 DECLARE @sort int=0;

SET @SplitEndPos = CHARINDEX(@SplitDelim, @StringToSplit, @SplitStartPos)

WHILE @SplitEndPos > 0
BEGIN
    SET @sort=@sort+1;
    SET @SplitValue = SUBSTRING(@StringToSplit, @SplitStartPos, (@SplitEndPos - @SplitStartPos))
    INSERT @SplitStringTable (KpiCode,Sort) VALUES (@SplitValue,@sort)
    SET @SplitStartPos = @SplitEndPos + 1
    SET @SplitEndPos = CHARINDEX(@SplitDelim, @StringToSplit, @SplitStartPos)
END

SET @SplitValue = SUBSTRING(@StringToSplit, @SplitStartPos, 2147483647)
SET @sort=@sort+1;
INSERT @SplitStringTable (KpiCode,Sort) VALUES(@SplitValue,@sort)


 RETURN
END

 示例：

select * from [dbo].[SPLITSort]('a,b,c',',')