从MySQL中的JOIN表中拉出同一个表中的多行

Question

I have a join table for a schedule (weeks 1, 2, 3, etc) that connects users. Each week in the join table has IDs for two separate users, User A and User B. But there are also multiple rows for each week. So it looks like this:

Schedule Table:

-----------------------------------
| week_id |  userA_id  | userB_id |
-----------------------------------
|    1    |     1      |   2      |   
|    1    |     2      |   3      |
----------------------------------

I also have a user table which stores all the information about a user, pretty basic stuff. So, for instance:

User Table:

-----------------------------------
|    id   |    Name    | Nickname |
-----------------------------------
|    1    |    jason   |   jay    |   
|    2    |    billy   |   bill   |
----------------------------------

What I'd like to do is query my schedule table based on the Week ID and then return a series of users for each Week. So for instance, give me all the users from week 1 in a series of objects, something like [ { UserA.name: jason, UserB.name: billy }, { UserA.name : billy, UserB.name: jane } ], etc.

I have a sneaking suspicion that this will include multiple JOIN statements, but I can't seem to get it working. Does anyone know how to structure this MySQL statement?

Answer 1

One option here is just to join the Schedule table twice to the User table, one join for each user in the relationship.

SELECT u1.Name,
       u2.Name
FROM Schedule s
INNER JOIN User u1
    ON s.userA_id = u1.id
INNER JOIN User u2
    ON s.userB_id = u2.id
WHERE s.week_id = 1