mysql - 名人堂领带(团体玩家，最高级别，然后当月份是每场比赛的最高分数......)

Question

需要列出最佳球员的名人堂，数据库包含不同比赛中的每个球员。

级别优先，如果级别相同，取最高分。

我有一个包含用户 ID、级别、分数、游戏和数据的数据库。架构在这里:

CREATE TABLE IF NOT EXISTS `docs` (`user_id` int(6) unsigned NOT NULL,
`level` int(3) unsigned NOT NULL,`game` varchar(30) NOT NULL,
`score` int(5) unsigned NOT NULL,
`data` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP
) ENGINE=MyISAM DEFAULT CHARSET=utf8;
INSERT INTO `docs` (`user_id`, `level`, `game`, `score`,`data`) VALUES
  ('1', '7', 'pacman', '8452','2018-02-14 15:00:00'),
  ('1', '9', 'pacman', '9999','2018-02-10 16:30:00'),
  ('2', '8', 'pacman', '8500','2018-02-24 17:30:00'),
  ('1', '10', 'pacman', '9100','2018-02-15 18:30:00'),
  ('1', '10', 'pacman', '8800','2018-02-15 18:11:00'),
  ('1', '11', 'snake', '9600','2018-02-14 15:00:00'),
  ('1', '6', 'snake', '7020','2018-02-11 11:30:00'),
  ('2', '8', 'snake', '8500','2018-02-24 14:00:00'),
  ('2', '12', 'snake', '9200','2018-02-25 19:00:00'),
  ('2', '12', 'snake', '9800','2018-02-25 19:20:00'),
  ('1', '4', 'pacman', '2452','2018-03-11 15:00:00'),
  ('1', '6', 'pacman', '4999','2018-03-07 16:30:00'),
  ('2', '7', 'pacman', '5500','2018-03-02 17:30:00'),
  ('1', '7', 'pacman', '5100','2018-03-01 18:30:00'),
  ('1', '3', 'snake', '3600','2018-03-03 15:00:00'),
  ('1', '5', 'snake', '4220','2018-03-01 11:30:00'),
  ('2', '5', 'snake', '3900','2018-03-04 14:00:00'),
  ('2', '5', 'snake', '5200','2018-03-05 19:00:00');

我想检索所选月份和游戏的名人堂， 例如，如果我在 ma​​rch 选择 pacman，结果应该是:

user level score
2     7    5500
1     7    5100

我在其他类似主题中尝试了这个建议

select d1.*
from docs d1 
left outer join docs d2
on (d1.user_id = d2.user_id and d1.level < d2.level)
where d2.user_id is null
order by level desc;

但是我有相同用户的重复关卡，所以我无法选择游戏或月份。

这里有 SQL Fiddle

Answer 1

SELECT x.* FROM docs x
JOIN 
(select user_id
      , game
      , MONTH(data) month
      , MAX(score) score
   from docs 
  where game = 'pacman' 
    and MONTH(data) = 3 
  group 
     by user_id
      , game
      , MONTH(data)
 ) y
 ON y.user_id = x.user_id
 AND y.game = x.game
 AND y.month = MONTH(x.data)
 AND y.score = x.score;

或者类似的东西