SQL Error: select pre_forum_thread.tid,pre_forum_thread.fid,pre_forum_thread.subject,pre_forum_threadimage.tid,pre_forum_threadimage.attachment from fitnessql.pre_forum_thread join fitnessql.pre_forum_threadimage on fitnessql.pre_forum_thread.tid = fitnessql.pre_forum_threadimage.tid where pre_forum_thread.subject like '%腹肌%' GROUP BY pre_forum_thread.tid LIMIT 50