SqlServer数据库自定义Split()函数

CREATE FUNCTION [dbo].[Split]

(

 @SplitString text, -- 如果要传入NText类型，下面需要相应的修改，注释行为NText下同

 @Separator varchar(2) = ','-- NVarChar(2) = N','

)

RETURNS @SplitStringsTable TABLE

(

 [id] int identity(1,1),

 [value] varchar(8000) -- NVarChar(4000)

)

AS

BEGIN

    DECLARE @CurrentIndex int;

    DECLARE @NextIndex int;

    DECLARE @ReturnText varchar(8000);-- NVarChar(4000)

    SELECT @CurrentIndex=1;

    WHILE(@CurrentIndex<=datalength(@SplitString)) -- DATALENGTH(@SplitString)/2

    BEGIN

        SELECT @NextIndex=charindex(@Separator,@SplitString,@CurrentIndex);

        IF(@NextIndex=0 OR @NextIndex IS NULL)

            SELECT @NextIndex=datalength(@SplitString)+1;--DATALENGTH(@SplitString)/2

       

        SELECT @ReturnText=substring(@SplitString,@CurrentIndex,@NextIndex-@CurrentIndex);

        INSERT INTO @SplitStringsTable([value])

        VALUES(@ReturnText);

       

        SELECT @CurrentIndex=@NextIndex+1;

    END

    RETURN;

END