Question

Two questions.

One: How would I be able to join two tables together, which are not the original FROM ‘x’ table?

Example: Grabbing all the reports and that users level name.

Report            
id | user_id      
1    1

User            
id | level_id      
1    1

Level            
id | level_name      
1    Admin

SELECT      report.id,
            report.user_id,
            level.name
FROM        report
INNER JOIN  user
ON          report.user_id=user.id
INNER JOIN  level
ON          user.level_id=level.id

Doesn’t seem to work.

Two: How to join tables not from a 1-1 but a 1-many?

Say I wanted to:

SELECT * FROM user JOIN report ON user.id=report.user_id WHERE user.id='4'

But only join with the most recent report ordered by date desc?

I know it seems like I am asking you to do my work for me, but I just need to know what to use to accomplish this, not necessarily you coding it. Thanks.

UPDATE:

First question: Fixed, thanks
Second question:

I’ll show you my query to make better sense, I didn’t explain it well. I meant a many-many relationship where I grab a list of users and their latest report!

SELECT
    user.id
FROM 
    user
<< INNER JOINS ON OTHER TABLES >>
INNER JOIN
    (
        SELECT 
            report.id
        FROM
            report
        WHERE user.id=report.user_id
        ORDER BY
            date
        DESC
        LIMIT 1
      )

Answer 1

For your second question:

MySQL-style:

SELECT *
FROM user
INNER JOIN report re
  ON re.id = (SELECT id 
              FROM report 
              WHERE user_id=user.id 
              ORDER BY report.date DESC
              LIMIT 1)
WHERE user.id='4'