删除一个表并在具有 where 条件的多个表上连接

Question

我正在尝试从 Skills_jobs 表中删除一行

以下是我的查询

delete from skills_jobs skj inner join jobs j on skj.jobid=j.id inner join users u on u.id=j.userid where u.id=$userid

但它会引发以下错误；

致命错误：未捕获的异常 'Exception' 带有消息 'You have an SQL 语法错误；检查与您对应的手册 MySQL 服务器版本，用于在 'skj inner join 附近使用正确的语法 工作 j on skj.jobid=j.id 内部加入用户 u on u.id=j.userid wher' at 第1行查询：从skills_jobs skj中删除inner join jobs j on skj.jobid=j.id 内部加入用户 u on u.id=j.userid where u.id=41

Answer 1

您必须设置表，从中删除行，然后尝试：

DELETE skills_jobs from skills_jobs INNER JOIN jobs j ON skills_jobs.jobid=j.id INNER JOIN users u ON u.id=j.userid WHERE u.id=$userid

参见https://dev.mysql.com/doc/refman/5.7/en/delete.html中的“多表删除”部分

Answer 2

应该是这样的

skills_jobs skj inner join jobs j on skj.jobid=j.id

你忘了语法

所以正确的语法应该是这样的：-

delete from skills_jobs skj inner join jobs j on skj.jobid=j.id inner join users u on u.id=j.userid where u.id=$userid

希望这会有所帮助！

Answer 3

delete from skills_jobs skj 
inner join jobs j ON skj.jobid=j.id 
inner join users u ON u.id=j.userid 
where u.id=$userid

试试上面的代码。 希望这会有所帮助。

Answer 4

DELETE FROM skills_jobs skj INNER JOIN jobs j ON j.id=skj.jobid INNER JOIN 
users u ON u.id=j.userid 
WHERE u.id=$userid

Answer 5

 DELETE FROM skj USING `skills_jobs` AS skj
 INNER JOIN `jobs` AS j ON skj.`jobid` = j.`id`
 INNER JOIN `users` AS u ON u.`id` = j.`userid` 
 WHERE u.`id` = $userid

如果为表声明别名，则在引用该表时必须使用别名。

另一个结构化的答案：

DELETE skj FROM `skills_jobs` AS skj
INNER JOIN `jobs` AS j ON skj.`jobid`=j.`id` 
INNER JOIN `users` AS u ON u.`id`=j.`userid`
WHERE u.`id`=$userid