mySQL “Rank in Highscore”-Query

Question

Hi there coders around the world,

I\'m working on a project where users can do certain things and gain points for it. To simplify this question let\'s say we got 2 t

Answer 1

The idea is to ask, "how many players rank above @this_user":

select count(*) + 1 from 
(
    /* list of all users */
    SELECT SUM( p.points ) AS sum_points
    FROM user u
    LEFT JOIN points p ON p.user_id = u.id
    GROUP BY u.id        
) x
/* just count the ones with higher sum_points */
where sum_points > (select sum(points) from points where user_id = @this_user)

Edited to make result 1-based instead of 0-based

Answer 2

SELECT  q.*,
        @r := @r + 1 AS rank
FROM    (
        SELECT  @r := 0
        ) vars,
        (
        SELECT  u.*,
                SUM(p.points) AS sum_points
        FROM
                user u
        LEFT JOIN
                points p
        ON      p.user_id = u.id
        GROUP BY
                u.id
        ORDER BY
                sum_points DESC
        ) q