このテーブルから最新の最大スコアを取得する方法を知っている人は誰でも:
----------------------------------------
|id |game_id |level |score |date |
----------------------------------------
|1 |0 |1 |90 |1391989720 |
|1 |0 |1 |95 |1391989721 |
|1 |0 |1 |95 |1391989722 |
|1 |1 |1 |4 |1391989723 |
|1 |1 |1 |8 |1391989724 |
|1 |1 |2 |6 |1391989725 |
----------------------------------------
これまでのところ、私はこれを持っています:
SELECT progress_max.game_id,
progress_max.level,
progress_max.date AS max_date,
max_score
FROM
(
SELECT game_id, level, MAX(score) AS max_score
FROM cdu_user_progress
WHERE lesson_id = 1
GROUP BY game_id, level
) AS ms
JOIN cdu_user_progress progress_max ON progress_max.game_id = ms.game_id AND progress_max.level = ms.level AND progress_max.score = ms.max_score
WHERE progress_max.lesson_id = 1
GROUP BY game_id, level
しかし、それは最初の最大スコア(日付1391989721)しか得られません...