Question

我有一个像这样的SQL表

year    tour     wins    cuts   money
1990     EUR       2         4    54,500
1990     USA       1         2    22,000
1991     EUR       4         2    154,000
1991     USA       2         1    245,000
and so on

我希望通过YEAR对结果进行分组，总结胜负但是，我希望单独保留money列，并从每个YEAR行返回两个值，如moneyEUR和moneyUSA（基于TOUR列）

我目前正在做这样的SELECT

SELECT year, SUM(wins), SUM(cuts), money FROM players GROUP BY year

这个组很好，但只返回第一个货币价值。

有没有办法可以将每个货币价值作为单独的价值返回？并且仍然每年补充其他值？

Answer 1

如果您每年总共有2条记录，那么您可以

SELECT year, 
       SUM(wins), 
       SUM(cuts), 
       sum(case when tour = 'EUR' then money end) as moneyEUR,
       sum(case when tour = 'USA' then money end) as moneyUSA
FROM players 
GROUP BY year

Answer 2

select t1.tour, t1.money, t1.year, t2.wins_sum, t2.cuts_sum
from players t1
join (
    select year
    sum(wins) wins_sum,
    sum(cuts) cuts_sum
    from players
    group by year
) t2 on t1.year = t2.year

对SELECT的结果进行分组但保留一些唯一值

2 个答案: