MySQL - Returnerar X-nummer för varje GROUP BY

Försök som nedan generera radnummer för varje grupp och begränsa sedan radnumret nedan, jag visar 2 resultat per grupp.

   Select
    `marka_name`, `model_name`, `kuzov`, `mileage`, `year`, `rate`from
    (

    SELECT
     @row_num := IF(@prev_value=main.Model_Name,@row_num+1,1) AS RowNumber,
                main.*,
    @prev_value := main.Model_Name
            FROM
                main,
      (SELECT @row_num := 1) x,
          (SELECT @prev_value := '') y
            WHERE
                (
                    (marka_name = 'SUBARU' AND model_name = 'IMPREZA' AND (kuzov = 'GC8' OR kuzov = 'GF8')) OR
                    (marka_name = 'MAZDA' AND model_name = 'RX-7' AND kuzov = 'FD3S') OR
                    (marka_name = 'MITSUBISHI' AND model_name = 'LANCER' AND (kuzov = 'CN9A' OR kuzov = 'CP9A')) OR
                    (marka_name = 'NISSAN' AND model_name = 'SKYLINE' AND (kuzov = 'ER34' OR kuzov = 'BCNR33')) OR
                    (marka_name = 'NISSAN' AND model_name = 'SILVIA' AND kuzov = 'S14') OR
                    (marka_name = 'TOYOTA' AND model_name = 'CELICA' AND kuzov = 'ST205') OR
                    (marka_name = 'TOYOTA' AND model_name = 'ARISTO' AND kuzov = 'JZS161') OR
                    (marka_name = 'MITSUBISHI' AND model_name = 'DELICA' AND (kuzov = 'PE8W' OR kuzov = 'PD8W' OR kuzov = 'PF8W'))
                )
                AND
                (rate != 'RA' AND rate != 'RR' AND rate != 'A1' AND rate != 'A' AND rate != 'R' AND rate >= '3')
                AND
                (mileage >= 0 AND mileage <= 150000)
                AND
                (year >= 1990 AND year <= 1998)
            ORDER BY
                model_name,
                mileage ASC,
                rate DESC) A where A.RowNumber<=2

För att få fler än 2 poster per grupp, ändra bara den sista där klausulen gillar om du får 10 resultat per grupp än. skriv där A.RowNumber<=10

Sql Fiddle Demo