Mysql SQL查询需要修改-不能多次显示同一主题

我在我的网站上有一张表格，上面显示了我在phpBB论坛上的最新帖子。我的查询按预期工作，只是每个主题只需要一个结果

如果有六个人连续回答一个话题，我不希望桌子上满是这一个话题；我只想要该主题的最新结果+其他五个

目前的情况是，如果我在某个主题中发布回复，该主题将出现在表格的顶部。X先生说，如果其他人回复了我的帖子，同样的主题会出现在我上面的列表中，带有我回复的链接+他的回复的链接。我希望他的回答比我的更近，如果有意义的话，可以替换该表中同一主题的列表

试试这个：

SELECT p.post_id, p.post_time, p.topic_id, p.forum_id, p.poster_id, 
       pt.topic_id, pt.topic_title, pu.user_id, pu.username, 
       pu.user_avatar, pu.user_avatar_type 
FROM phpbb_posts p
INNER JOIN (SELECT topic_id, MAX(post_time) post_time FROM phpbb_posts GROUP BY topic_id) A ON p.topic_id= A.topic_id AND p.post_time = A.post_time 
INNER JOIN phpbb_topics pt ON p.topic_id = pt.topic_id
INNER JOIN phpbb_users pu ON p.poster_id = pu.user_id
WHERE p.forum_id NOT IN (21, 23)
ORDER BY p.post_time DESC 
LIMIT  0, 6;

或

---

嗨，萨哈什。我已经插入了你的代码，但不幸的是，我仍然得到了相同的结果，也就是说，在论坛的两篇最新帖子位于同一主题的地方，我得到了重复的结果

SELECT p.post_id, p.post_time, p.topic_id, p.forum_id, p.poster_id, 
       pt.topic_id, pt.topic_title, pu.user_id, pu.username, 
       pu.user_avatar, pu.user_avatar_type 
FROM phpbb_posts p
INNER JOIN (SELECT topic_id, MAX(post_time) post_time FROM phpbb_posts GROUP BY topic_id) A ON p.topic_id= A.topic_id AND p.post_time = A.post_time 
INNER JOIN phpbb_topics pt ON p.topic_id = pt.topic_id
INNER JOIN phpbb_users pu ON p.poster_id = pu.user_id
WHERE p.forum_id NOT IN (21, 23)
ORDER BY p.post_time DESC 
LIMIT  0, 6;

SELECT p.post_id, p.post_time, p.topic_id, p.forum_id, p.poster_id, 
       pt.topic_id, pt.topic_title, pu.user_id, pu.username, 
       pu.user_avatar, pu.user_avatar_type 
FROM (SELECT * FROM (SELECT * FROM phpbb_posts p ORDER BY p.topic_id, p.post_time DESC) AS A GROUP BY topic_id) AS p
INNER JOIN phpbb_topics pt ON p.topic_id = pt.topic_id
INNER JOIN phpbb_users pu ON p.poster_id = pu.user_id
WHERE p.forum_id NOT IN (21, 23)
ORDER BY p.post_time DESC 
LIMIT  0, 6;