在我的表“game_info”中我有
ID | player_1 | player_2 | score
--------------------------------
1 | John | Rick | 100
2 | Joe | John | 80
3 | Bob | Rick | 210
我想总结每位玩家的总分,无论他们是player_1还是player_2并按分数排序 我的期望是:
Name | Score
------------
Rick | 310
Bob | 210
John | 180
Joe | 80
我曾尝试过JOIN和UNION,但我做不到。
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!
答案 0 :(得分:3)
您可以使用union all
和group by
:
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;
答案 1 :(得分:0)
SELECT player, SUM(score)
FROM
(SELECT player_1 AS player, score
FROM t
UNION ALL
SELECT player_2 as player, score
FROM t) sub
GROUP BY player
你必须将玩家1的结果与玩家2的结果结合起来,这样你才能得到一个只有玩家和得分的结果。当然,在这个视图中,分数将被列出两次,每个玩家一个。在我的查询中,结果称为sub。基于sub,您可以按玩家分组并总结他们的分数。