Mysql 获取总和（val）与最大值（总和（val））相同的记录

这是我的SQL：

SELECT prefs.* 
FROM form_answer fa 
JOIN game g ON g.id = fa.game_id
JOIN customer c ON c.code = fa.`data`
JOIN (
    SELECT c.code code, p.pnt_version_id ver, prod_type, ROUND(SUM(value)/40*100,1) AS val
    FROM point p JOIN customer c
    GROUP BY c.code, p.pnt_version_id, prod_type
    ORDER BY val DESC   
) prefs ON g.pnt_version_id = prefs.ver AND c.code = prefs.code

WHERE fa.game_id = 44 AND fa.question_id = 34
ORDER BY prefs.val DESC

现在，我只需要获取与MAXval具有相同val的记录。需要帮忙吗

+------+-----+-----------+------+ | code | ver | prod_type | val | +------+-----+-----------+------+ | 101 | 110 | 1 | 87.5 | | 101 | 110 | 3 | 87.5 | | 101 | 110 | 2 | 62.5 | +------+-----+-----------+------+