從每個球員前3名的結果和排序總

Question

我需要拿出一個結果，顯示前3名的結果，從每個球員，以及將和數對它進行排序

示例表的總和：

David = 12 Mike = 17 John = 20 Bill = 20 
David = 12 Mike = 16 John = 18 Bill = 20 
David = 11 Mike = 15 John = 16 
David = 10 Mike = 14 John = 16 
David = 10    John = 15 

結果需要顯示如下：

John = 54 
Mike = 50 
Bill = 40 
David = 35 

我已經到位排名爲所有事件（簡單）：

SELECT playerName, SUM(`eventPoints`) 
FROM `eventresults` 
GROUP BY `playername` 
ORDER BY SUM(`eventPoints`) DESC 

我想做到以下幾點與PHP代碼：

1. 創建一個表名爲top3Events在啓動
2. 通過查詢的結果看了上面的表eventResults
3. TRUNCATE top3Events
4. 使用計數器並重置每個新玩家名稱
5. INSERT INTO top3Events when counter < = 3

運行此查詢：

SELECT playerName, SUM(`eventPoints`) 
FROM `top3Events` 
GROUP BY `playername` 
ORDER BY SUM(`eventPoints`) DESC 

不知道這是去與此

Answer 1

正確的方式我想沒有人願意解決這個。評論中有一個很好的鏈接，但我可能會使用SQL和代碼（PHP）的混合方式來處理這個問題。我的解決方案假定playerName是玩家的主鍵，有沒有非常多的玩家

我第一次執行這個查詢（最好從players表來獲得，如果有的話）：

SELECT DISTINCT `playerName` 
FROM `eventResults` 

我然後遍歷該查詢結果，建立了一系列的查詢，我會UNION：要每次觀看時間進行

SELECT `sub`.`playerName`, 
    SUM(`sub`.`eventPoints`) AS `pointsSum` 
FROM (
    SELECT `playerName`, 
     `eventPoints` 
    FROM `eventResults` 
    WHERE `playerName` = '$playerName' 
    ORDER BY `eventPoints` DESC 
    LIMIT 3 
) AS `sub` 

如果計算不需要，你可以存儲產生一個彙總表並在查看時使用它。

---

使用在你的榜樣名稱，生成的查詢應該是這樣的：

SELECT `sub`.`playerName`, 
    SUM(`sub`.`eventPoints`) AS `pointsSum` 
FROM (
    SELECT `playerName`, 
     `eventPoints` 
    FROM `eventResults` 
    WHERE `playerName` = 'David' 
    ORDER BY `eventPoints` DESC 
    LIMIT 3 
) AS `sub` 

UNION 
SELECT `sub`.`playerName`, 
    SUM(`sub`.`eventPoints`) AS `pointsSum` 
FROM (
    SELECT `playerName`, 
     `eventPoints` 
    FROM `eventResults` 
    WHERE `playerName` = 'Mike' 
    ORDER BY `eventPoints` DESC 
    LIMIT 3 
) AS `sub` 

UNION 
SELECT `sub`.`playerName`, 
    SUM(`sub`.`eventPoints`) AS `pointsSum` 
FROM (
    SELECT `playerName`, 
     `eventPoints` 
    FROM `eventResults` 
    WHERE `playerName` = 'John' 
    ORDER BY `eventPoints` DESC 
    LIMIT 3 
) AS `sub` 

UNION 
SELECT `sub`.`playerName`, 
    SUM(`sub`.`eventPoints`) AS `pointsSum` 
FROM (
    SELECT `playerName`, 
     `eventPoints` 
    FROM `eventResults` 
    WHERE `playerName` = 'Bill' 
    ORDER BY `eventPoints` DESC 
    LIMIT 3 
) AS `sub` 

ORDER BY `pointsSum` DESC