SQL 数组参数的分割

CREATE PROCEDURE DeleteNews 
    @ID nvarchar(500) 
as 
    DECLARE @PointerPrev int 
    DECLARE @PointerCurr int 
    DECLARE @TId int 
    Set @PointerPrev=1 
     
    while (@PointerPrev < LEN(@ID)) 
    Begin 
        Set @PointerCurr=CharIndex(',',@ID,@PointerPrev) 
        if(@PointerCurr>0) 
        Begin 
            set @TId=cast(SUBSTRING(@ID,@PointerPrev,@PointerCurr-@PointerPrev) as int) 
            Delete from News where ID=@TID 
            SET @PointerPrev = @PointerCurr+1 
        End 
        else 
            Break 
    End 
    --删除最后一个,因为最后一个后面没有逗号,所以在循环中跳出,需另外再删除 
     set @TId=cast(SUBSTRING(@ID,@PointerPrev,LEN(@ID)-@PointerPrev+1) as int) 
     Delete from News where ID=@TID 
GO