Mysql 加入查询从其他表中检索具有 ID 的用户的个人资料图像

Question

I'm having trouble with a join query, my issue is as follows.

Table: battles
Fields: id,attacker_id,defender_id

Table: users
Fields: id,profile_image

I would like to do a query to retrieve a battle and get the profile images as well from the other table.

Is there a way to do this in a single or do I have to do more than one?

Thanks in advance.

Answer 1

I wanted to wait a while to see if you had any attempt or if you will answer my first question to know if I understood the problem. But maybe you don't have a starting point. Try something like:

SELECT 
    a.profile_image as attacker_profile_image,
    d.profile_image as defender_profile_image
FROM 
    `battles` b
LEFT JOIN 
    `users` a 
ON 
    b.`attacker_id` = a.`id` 
LEFT JOIN 
    `users` d 
ON 
    b.`defender_id` = d.`id` 

the problem here is the fact that you need to join with the users table twice, so you will need to create aliases for the columns you plan to use

This query will fetch the two images only, you will need to add the extra fields