CREATE FUNCTION Func (@number INT)
RETURNS VARCHAR(32)
AS BEGIN

    DECLARE @dpd VARCHAR(64)
    ;
    WITH
        _Range (i) AS
        (
            SELECT 1
            UNION ALL
            SELECT i + 1
            FROM _Range
            WHERE i !> 5000
        )
        , Main AS
        (
            SELECT i
                , CASE
                    WHEN i BETWEEN 1 AND 50 THEN '1-50'
                    WHEN i BETWEEN  51 AND 90 THEN '51-90'
                    WHEN i BETWEEN 91 AND 180 THEN '91-180'
                    WHEN i BETWEEN 181 AND 250 THEN '181-250'
                    WHEN i > 250 THEN '250+'
                END attr_1
                , CASE
                    WHEN i BETWEEN 1 AND 1000 THEN '1-1000'
                    WHEN i BETWEEN 1001 AND 2000 THEN '1001-2000'
                    WHEN i BETWEEN 2001 AND 3000 THEN '2001-3000'
                    WHEN i BETWEEN 3001 AND 4000 THEN '3001-4000'
                    WHEN i BETWEEN 4001 AND 5000 THEN '4001-5000'
                END attr_2
            FROM _Range

        )

    SELECT @dpd = CONCAT(attr_1, ', ', attr_2)
    FROM Main
    WHERE i = @number
    OPTION (MAXRECURSION 0)
    ;
    RETURN @dpd

END
GO