MySQL的不同或分組

Question

SELECT DISTINCT(player2) FROM logs 
WHERE player1=3 
ORDER BY time DESC

可以通過該查詢返回其他非不同的列嗎？

或者我的其他解決方案：

SELECT * FROM logs 
WHERE player1=3 
GROUP BY player2 ORDER BY time DESC

這可以正常工作，但訂購不正確。 它選擇該組中的第一個。

表示例：

player1 player2 time
3        5        1
3        5        2
3        6        3

我希望它會返回：

player2 time
5        2
6        3

但它返回（與分組依據）：

player2 time
5        1
6        3

Answer 1

嘗試這個：

SELECT player2, MAX(time) AS time
  FROM logs 
 WHERE player1=3 
 GROUP BY player2 
 ORDER BY time DESC

Answer 2

SELECT player2, max(`time`) as max_time
FROM logs 
WHERE player1 = 3 
GROUP BY player2 

Answer 3

SELECT player2, MAX(time) AS time   
FROM logs   
WHERE player1=3  
GROUP BY player2   
ORDER BY MAX(time)