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Re: Equivalent d'un LIMIT dans une sous requete
Posted by: Huu Da Tran
Date: May 26, 2008 12:23PM

Est-ce que les données sont trop immenses pour passer par une table temporaire?
create temporary table `tmp_journee_points` (
    `journee_id` int,
    `user_id` int,
    `points` int,
    `idx` int auto_increment,
    primary key (`user_id`, `idx`)
);
insert into `tmp_journee_points` (`journee_id`, `user_id`, `points`)
    select `journee_id`, `user_id`, `points`
    from `journee_points`
    order by `points` DESC;
select avg(j1.`points`) as 'moyenne',
    j1.`user_id` as 'user_id'
from `journee` as j1
    left join (
      select les 15 meilleures journées par joueur
    ) as j2 on (j1.`user_id` = j2.`user_id` and j2.idx <= 15)
...

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Re: Equivalent d'un LIMIT dans une sous requete
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May 26, 2008 12:23PM


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