sql - SQL从连接表中删除不起作用

Question

下面返回一个语法错误问题。在网上彻底搜索后，我不明白为什么。有任何想法吗？

delete Tracks                                                                                                                                                     
from tracks                                                                                                                                                                      
left join releases                                                                                                                                                               
on tracks.label_id=releases.label_id                                                                                                                                             
where tracks.label_id = 185 
and releases.id = 4394 
and tracks.position = 1 
and tracks.name != 'Da Antidote';

语法错误在第 1 行。

Answer 1

如果我没记错的话，Postgres 不允许加入DELETE，但您可以使用该USING关键字，如文档中所述：

DELETE FROM Tracks 
USING releases  
WHERE tracks.label_id=releases.label_id  
AND tracks.label_id = 185 
AND releases.id = 4394 
AND tracks.position = 1 
AND tracks.name != 'Da Antidote';

Answer 2

delete from tracks                                                                                                                                                                      
left join releases                                                                                                                                                               
on tracks.label_id=releases.label_id                                                                                                                                             
where tracks.label_id = 185 
and releases.id = 4394 
and tracks.position = 1 
and tracks.name != 'Da Antidote';

Answer 3

您可以使用 EXISTS 子句：

DELETE FROM tracks t1 WHERE EXISTS (
    SELECT 1 FROM releases t2 WHERE 
        t1.label_id = t2.label_id
        AND yadda, yadda, yadda
);