Question

我的下表players带有：

ID;color;race;score
1;"red";"elf";400
2;"blue";"elf";500
3;"green";"elf";300
4;"blue";"elf";200
5;"red";"elf";700
6;"red";"troll";100
7;"blue";"troll";400
8;"green";"troll";500
9;"red";"troll";400
10;"yellow";"troll";1000
11;"red";"nord";900
12;"green";"nord";100
13;"yellow";"nord";500
14;"blue";"nord";7000

我想要每个种族，最高分数以及该玩家的颜色和ID。喜欢这个

elf 700 red 5
nord 7000 blue 14
troll 1000 yellow 10

我可以得到的前两栏：

select category,max(score)
from players
group by category;

但是我无法添加该播放器的颜色和ID。我该怎么做？

Answer 1

您可以使用RANK功能：

WITH cte AS
(
  SELECT *, RANK() OVER(PARTITION BY race ORDER BY score DESC) AS r
  FROM players
)
SELECT race, score, color, id
FROM cte
WHERE r = 1;

的 LiveDemo

输出：

╔═══════╦═══════╦════════╦════╗ ║ race ║ score ║ color ║ id ║ ╠═══════╬═══════╬════════╬════╣ ║ elf ║ 700 ║ red ║ 5 ║ ║ nord ║ 7000 ║ blue ║ 14 ║ ║ troll ║ 1000 ║ yellow ║ 10 ║ ╚═══════╩═══════╩════════╩════╝

使这个组和最大查询工作

1 个答案: