Question

我有疑问：

SELECT *
FROM `phpbb_posts` AS a
JOIN phpbb_posts_text AS b ON a.post_id = b.post_id
WHERE a.poster_id =5413

它给了我X行数，我想要一个将删除所有这些行的查询（我不需要先选择那只是JOIN的一个例子。

任何帮助？

Answer 1

这很简单。

DELETE a, b    
FROM `phpbb_posts` AS a
JOIN phpbb_posts_text AS b ON a.post_id = b.post_id
WHERE a.poster_id =5413

Answer 2

您可以单独删除每个表

DELETE b
FROM phpbb_posts_text AS b
INNER JOIN `phpbb_posts` AS a 
     ON 
          a.post_id = b.post_id
     AND  a.poster_id =5413

DELETE a
FROM `phpbb_posts` AS a
WHERE a.poster_id =5413

第二个可以写成

DELETE `phpbb_posts` 
WHERE poster_id =5413

从具有连接的两个表中删除

2 个答案: