用自定义函数拆分字符串

CREATE FUNCTION dbo.mysplit(
@s   varchar(8000),   --待分拆的字符串
@split varchar(10)     --数据分隔符
)RETURNS @re TABLE(col varchar(100))
AS
BEGIN
DECLARE @splitlen int
SET @splitlen=LEN(@split+'a')-2
WHILE CHARINDEX(@split,@s)>0
BEGIN
     INSERT @re VALUES(LEFT(@s,CHARINDEX(@split,@s)-1))
     SET @s=STUFF(@s,1,CHARINDEX(@split,@s)+@splitlen,'')
END
  INSERT @re VALUES(@s)
RETURN
END

select * from dbo.mysplit('123,124,159',',')