对多列进行分组和汇总

Question

包含以下列的表：

id | name1 | score1 | name2 | score2

我需要在一个

中转换这两个查询的结果

SELECT name1, SUM(score1) as a
FROM partidos
GROUP BY name1
ORDER BY a DESC;

SELECT name2, SUM(score2) as b
FROM partidos
GROUP BY name2
ORDER BY b DESC;

结果为“a + b”，我需要在一个查询中使用此总和和名称。

示例：

id |   name1  |  score1  |   name2  |  score2
1  | james    | 5        | carolina | 3
2  | carolina | 3        | troll    | 9
3  | mordor   | 6        | ent      | 5
4  | carolina | 1        | paul     | 3
5  | paul     | 18       | kek      | 1

结果：

paul 21
troll 9
carolina 7
mordor 6
ent 5
james 5
kek 1

Answer 1

使用UNION ALL将Score1和Score2合并为一列，然后执行SUM

select Name, SUM(Total)
from
(
SELECT name1 as Name, score1 as Total
FROM partidos
union all
SELECT name2, score2 as Total
FROM partidos
) A
GROUP BY Name