mysql - IN 运算符不返回范围内的所有记录

Question

我正在尝试返回 round 范围内所有可用的 matches，每一轮可以有不同的 match。所以我写了这个查询:

SELECT m.id, m.round_id, m.gameweek
 FROM `match` m
 LEFT JOIN competition_rounds r ON m.round_id = r.id
 LEFT JOIN competition_seasons s ON r.season_id = s.id
 LEFT JOIN competition c ON c.id = s.competition_id
 WHERE 1 AND
 m.status = 5 AND
 m.round_id IN (488, 489, 490, 491) AND
 m.gameweek = (SELECT MAX(m2.gameweek)
                FROM `match` m2
                WHERE m2.round_id IN (488, 489, 490, 491))

现在的问题是结果只返回id为488的回合的匹配，为什么其他回合被忽略了？ 谢谢。

Answer 1

我想你可能想要:

SELECT m.id, m.round_id, m.gameweek
 FROM `match` m
 LEFT JOIN competition_rounds r ON m.round_id = r.id
 LEFT JOIN competition_seasons s ON r.season_id = s.id
 LEFT JOIN competition c ON c.id = s.competition_id
 WHERE 1 AND
 m.status = 5 AND
 m.round_id IN (488, 489, 490, 491) AND
 m.gameweek = (SELECT MAX(m2.gameweek)
                FROM `match` m2
                WHERE m2.round_id = m.round_id))