错误查询：DELETE和LEFT JOIN

Question

DELETE FROM programSchedule 
LEFT JOIN program ON programSchedule.pid = program.id 
WHERE program.channel_id = 10

我收到此错误：

  

＃1064 - 您的SQL语法出错;检查手册   对应于您的MySQL服务器   用于正确语法的版本   靠近'LEFT JOIN program ON   programSchedule.pid = program.id'at   第1行

为什么？

Answer 1

您需要指定要删除的表格。

DELETE programSchedule.*
FROM programSchedule LEFT JOIN program ON programSchedule.pid = program.id
WHERE program.channel_id = 10

注意：由于您要按INNER JOIN

进行过滤，因此请将联接更改为program.channel_id

DELETE programSchedule.*
FROM programSchedule INNER JOIN program ON programSchedule.pid = program.id
WHERE program.channel_id = 10

Answer 2

由于涉及两个表，您需要说明要从哪个表中删除。因此，为了删除programSchedule表中的行，您可以执行以下操作：

DELETE programSchedule.* 
FROM programSchedule 
LEFT JOIN program ON programSchedule.pid = program.id 
WHERE program.channel_id = 10