Mysql 查询 - 无法找到执行此操作的方法

Question

INSERT INTO `table` (`game_id`, `first`, `second`, `third`)
VALUES
    (1, 'jack', 'joe', 'pat'),
    (2, 'jack', 'joe', 'jess'),
    (3, 'pat', 'jess', 'jack'),
    (4, 'pat', 'jess', 'jack');

这是一个统计表，其中包含每场比赛的前三名球员。我希望拉动所有玩家并相应地对其进行排序。

First place - 3 points
Second place - 2 points
Third place - 1 point

所以，它应该返回:

id  player  points
1   jack    8
2   pat     7
3   jess    5
4   joe     4

我想不出一种方法来用一个查询来做到这一点。

Answer 1

Select player, sum(points) as points from (
Select `first` as player, count(`first`)*3 as points From gameStats group by `first` 
union all
Select `second` as player, count(`second`)*2 as points From gameStats group by `second` 
union all
Select `third` as player, count(`third`)*1 as points From gameStats group by `third` ) as tmp group by player

应该这样做。

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