具有多个表，列，值的SQL查询

Question

我对SQL很陌生，因此如果我写完整的废话，请温和一点。我得到了一个phpbb数据库，我需要从特定用户获取topic_track中所有主题的post_topic和post_text。我的不成功的查询（再次，基本上没有SQL的知识）如下：

SELECT post_subject, post_text 
FROM phpbb_posts 
WHERE topic_id=(ALL topic_id from phpbb_topics_track where user_id='165261') 

你能帮我找到正确的查询吗？

非常感谢您提前！

Answer 1

这将是

SELECT post_subject, post_text 
FROM phpbb_posts 
WHERE topic_id = ANY (select topic_id from phpbb_topics_track where user_id='165261'); 

或

SELECT post_subject, post_text 
FROM phpbb_posts 
WHERE topic_id IN (select topic_id from phpbb_topics_track where user_id='165261');