Mysql, ordering results by the highest score (inner query)

Hi,

I have two tables in a database;

players
- id (int)
- name (varchar)

player_votes
- id (int)
- player_id (int)
- up_vote (tinyint)

The players table contains a list of football players. In the application users can up vote or downvote a player, each up or down vote results in an entry in the player_votes table, and the up_vote field is either 1 or 0.

What I'm trying to do is a return a list of 10 players that have the highest score. Score being the total number of up_votes of a player, divided by the total number of votes.

I've come up with the following query which I think might have done it, but I'm getting an error "check the manual that corresponds to your MySQL server version for the right syntax to use near '/total_votes AS score ORDER BY score ASC' at line 5".

SELECT p.*
          FROM players AS p,
            (SELECT count(pv1.id) FROM player_votes AS pv1 WHERE player_id = p.id) AS total_votes,
            (SELECT sum(pv1.up_vote) FROM player_votes AS pv2 WHERE player_id = p.id) AS up_votes,
            up_votes/total_votes AS score
          ORDER BY score ASC

Open in new window


I suspect I've probably got this query all wrong, and maybe there's even a much easier was of doing the same thing?
SheppardDigitalAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Mike EghtebasDatabase and Application DeveloperCommented:
SELECT p.Id
              , p.Name
              , count(pv1.id)  AS total_votes
              , sum(pv1.up_vote) / count(pv1.id)  AS score
FROM players AS p inner join player_votes AS pv1
            ON pv1.player_id = p.id
Group By Id, Name
Order By sum(pv1.up_vote) / count(pv1.id)

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
MySQL Server

From novice to tech pro — start learning today.