根据游戏结果返回rank的SQL Server查询

Question

我已经看过类似于StackOverflow询问的其他多个问题，但似乎没有任何东西符合我的账单。我的查询稍微复杂一些。基本上，我需要找到条目的等级。

我的表结构是：

的TestEntry

Id, TotalTime, DateCreated 

GameResult

GameId, TestEntryId, Duration, Score 

QuestionResult

QuestionId, TestEntryId, Correct, UsersAnswer 

查询来计算所有的分数通过以下完成：

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 

基于特定TestEntry.Id，我需要确定进入的等级。由于临时表的使用，证明了棘手的问题，事实上TestEntry表中没有“TotalScore”，它正在被动态计算。

Answer 1

除非临时表需要临时表，否则就解决它们并使用公用表表达式。然后使用RANK函数获取每个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