根據遊戲結果返回rank的SQL Server查詢

Question

我已經看過類似於StackOverflow詢問的其他多個問題，但似乎沒有任何東西符合我的賬單。我的查詢稍微複雜一些。基本上，我需要找到條目的等級。

我的表結構是：

的TestEntry

Id, TotalTime, DateCreated 

GameResult

GameId, TestEntryId, Duration, Score 

QuestionResult

QuestionId, TestEntryId, Correct, UsersAnswer 

查詢來計算所有的分數通過以下完成：

CREATE TABLE #GRS 
(
TestEntryId uniqueidentifier, 
Score int 
) 

CREATE TABLE #QRS 
(
    TestEntryId uniqueidentifier, 
    CorrectAnswers int 
) 
/* Populate temp tables with Game/Question results */ 
INSERT INTO #GRS 
SELECT 
     TestEntryId, 
     SUM(Score) AS Score 
    FROM GameResult 
    GROUP BY TestEntryId 

INSERT INTO #QRS 
SELECT 
     TestEntryId, 
     COUNT(*) CorrectAnswers 
    FROM QuestionResult 
    WHERE Correct = 1 
    GROUP BY TestEntryId 

SELECT 
     Id, ISNULL(GRS.Score,0) + (ISNULL(QRS.CorrectAnswers,0) * 25) AS Score 
    FROM TestEntry TE 
    LEFT JOIN #GRS GRS ON(GRS.TestEntryId = TE.Id) 
    LEFT JOIN #QRS QRS ON(QRS.TestEntryId = TE.Id) 
    WHERE TE.TotalTime > 0 

基於特定TestEntry.Id，我需要確定進入的等級。由於臨時表的使用，證明了棘手的問題，事實上TestEntry表中沒有「TotalScore」，它正在被動態計算。

Answer 1

除非臨時表需要臨時表，否則就解決它們並使用公用表表達式。然後使用RANK函數獲取每個ID的排名。

;WITH GRS AS 
(
    SELECT 
     TestEntryId, 
     SUM(Score) AS Score 
    FROM GameResult 
    GROUP BY TestEntryId 
), 
QRS AS 
(
SELECT 
     TestEntryId, 
     COUNT(*) CorrectAnswers 
    FROM QuestionResult 
    WHERE Correct = 1 
    GROUP BY TestEntryId 
), 
Scores AS 
(
SELECT 
     Id, ISNULL(GRS.Score,0) + (ISNULL(QRS.CorrectAnswers,0) * 25) AS Score 
    FROM TestEntry TE 
    LEFT JOIN GRS ON(GRS.TestEntryId = TE.Id) 
    LEFT JOIN QRS ON(QRS.TestEntryId = TE.Id) 
    WHERE TE.TotalTime > 0 
) 
SELECT Id,Score,RANK() OVER (ORDER BY Score DESC) AS [Rank] FROM Scores