SQL - GROUP BY和ORDER BY MIN

Posted 2021-05-04

我有桌面球员的结果：

id | id_user | timems | status | cancel

玩家在开始游戏时选择两种状态：1或2。我列出最佳时间排名：

SELECT *, MIN(timems) AS besttime 
FROM `wyniki` 
WHERE NOT cancel=1 
GROUP BY id_user 
ORDER BY MIN(timems) ASC

这是有效的，但我不知道'状态'的最佳时间是什么。

答案

此查询容易出错

你可以这样做

SQL查询：

SELECT id_user, status , MIN(timems) AS besttime FROM `wyniki` 
WHERE NOT cancel=1 GROUP BY id_user, status ORDER BY MIN(timems) ASC

另一答案

SELECT id_user, 
       MIN(case when status = 1 then timems else null end) AS best_time_1,
       MIN(case when status = 2 then timems else null end) AS best_time_2
FROM wyniki 
WHERE cancel <> 1 
GROUP BY id_user 
ORDER BY MIN(timems) ASC