MySQL - query with INNER JOIN + WHERE clause

Question

SELECT `views`.* FROM `views` 
    INNER JOIN memberships ON memberships.second_id = views.user_id 
    WHERE (memberships.user_id = 1 OR views.user_id = 1)

I have this MySQL query - my problem is, that the second part of WHERE clause doesn't work, are fetched only rows, which equals memberships.user_id = 1 , but already not OR views.user_id = 1 .

Why not? What's wrong?

Answer 1

那是因为您要加入memberships.second_id也许应该是memberships.user_id=views.user_id因为如果条件memberships.user_id=1为真，则views.user_id等于memberships.second_id，并且second_id可能不等于1个