SELECT * FROM talk_itemLEFT JOIN first_comment ON talk_item.tid=first_comment.tidLEFT JOIN user ON talk_item.uid=user.uidLEFT JOIN user ON first_comment.uid=user.uid[WHERE 帖子筛选条件] LIMIT 10
SELECT * FROM talk_item
LEFT JOIN first_comment ON talk_item.tid=first_comment.tid
LEFT JOIN user ON talk_item.uid=user.uid
LEFT JOIN user ON first_comment.uid=user.uid
[WHERE 帖子筛选条件] LIMIT 10