Question

I use PHP and MySQL and I
have 2 tables:

• table score: have fields ‘user_id’ and ‘score’
• table user: have fields ‘user_id’ and ‘user_name’

People play game then store user_id and score in table ‘score’ every time game was ended. There are many rows for a single user in table score.

What I want?
I want to select top 10 players with distinct user_name to show on the list, so what is the correct sql? Code below is now my current sql, but it’s not show result what I want.

  SELECT DISTINCT * FROM score as t1
  INNER JOIN user AS t2 ON t1.user_id=t2.user_id
  WHERE score>0
  ORDER BY t1.score DESC
  LIMIT 10

What is the mistake for this?

Answer 1

does this work? (not tested)

    select username, max(score) as maxscore 
from score, user
 where score.userid=user.userid and score>0 
group by username 
order by maxscore desc