如何用联接替换子查询

Question

我有一个查询，我需要用联接替换子查询。

SELECT DISTINCT m.prob_id, m.*, m.id as mh_trans_id, v.id as unlock_id
    FROM (
         SELECT * FROM m_trans
         WHERE type = '1' AND is_test = '0' AND posted_on >=  '2018-05-01'
             AND prob_id IS NOT NULL
             AND is_p = 1
             GROUP BY prob_id HAVING count(*) = 1
     ) as m
         LEFT JOIN vid_u v ON m.i_id = v.v_id AND m.u_id = v.u_id
             WHERE status = 'success' AND v.id IS NULL
             GROUP BY m.i_id, m.s_u_id, m.u_id
             ORDER BY m.p_on ASC;