如何在postgreSQL中执行此SQL查询？

Question

如何在PostgreSQL中执行此查询？

我在SQL中的尝试

SELECT stories.*
        where 
            user.id = 1 AND 
            user.id = usersources.userid AND 
            usersources.id = source.id AND 
            source.id = story.id 
            AND (story.id = user.id) IS NOT IN actions table  

文字说明

SELECT
    stories
WHERE
 they have a relationship to a source AND
 sources has a story AND
 there IS NOT a row in actions from user and story (aka already acted on story)

上下文

  

这是一个用户可以订阅许多新闻来源的应用   并刷新闻。一旦用户刷新消息他们就不应该   再次看到那个新闻故事。

视觉表格

Answer 1

好的，我认为这会让你满意。

SELECT s.*
FROM stories s
INNER JOIN actions a ON s.id = a.storyid
INNER JOIN sources s1 ON s.id = s1.id
INNER JOIN usersources us ON s1.id = us.sourceid
INNER JOIN users u ON us.userid = u.id
WHERE u.id = 1 
AND u.id != a.userid