MySQL Error
Message: MySQL Query Error
SQL: SELECT m.mid, m.touid, m.username, m.fromuid,mc.title,mc.content FROM `数据库名称`.pw_msg m LEFT JOIN `数据库名称`.pw_msgc mc USING(mid) WHERE mid='37915' AND (touid='26212' OR fromuid='26212')
Error: Column 'mid' in where clause is ambiguous
Errno.: 1052