sql server split切割字符串

create FUNCTION [dbo].[dnt_split]
(
 @splitstring varchar(max),
 @separator CHAR() = ','
)
RETURNS @splitstringstable TABLE
(
 [item] VARCHAR()
)
AS
BEGIN
    DECLARE @currentindex INT
    DECLARE @nextindex INT
    DECLARE @returntext VARCHAR()

    SELECT @currentindex=

    WHILE(@currentindex<=datalength(@splitstring))
    BEGIN
        SELECT @nextindex=charindex(@separator,@splitstring,@currentindex)
        IF(@nextindex= OR @nextindex IS NULL)
            SELECT @nextindex=datalength(@splitstring)+

        SELECT @returntext=substring(@splitstring,@currentindex,@nextindex-@currentindex)

        INSERT INTO @splitstringstable([item])
        VALUES(@returntext)

        SELECT @currentindex=@nextindex+
    END
    RETURN
END

调用方法：

select * from dbo.dnt_split('123,123',',')