MySQL 在两列中搜索值并求和第三列

Question

在我的表“game_info”中有

ID | player_1 | player_2 | score
--------------------------------
1  | John     | Rick     | 100
2  | Joe      | John     |  80 
3  | Bob      | Rick     | 210

我想计算每个玩家的总分，无论他们是 player_1 还是 player_2，并按分数排序。
我期望的是:

Name | Score
------------
Rick | 310
Bob  | 210
John | 180
Joe  |  80

我试过 JOIN 和 UNION，但我做对了。

有没有办法在 sql 中执行此操作，或者我必须重新设计我的表？

谢谢!

Answer 1

您可以使用union all 和group by 来做到这一点:

select player, sum(score)
from ((select player1 as player, score from game_info
      ) union all
      (select player2 as player, score from game_info
      )
     ) p
group by player
order by sum(score) desc;