46

所以这是我的查询

SELECT 
    * 
FROM 
    Score  AS NewScores 
WHERE 
    InsertedDate >= DATEADD(mm, -3, GETDATE());


SELECT 
    ROW_NUMBER() OVER( ORDER BY NETT) AS Rank, 
    Name, 
    FlagImg, 
    Nett, 
    Rounds 
FROM (
    SELECT 
        Members.FirstName + ' ' + Members.LastName AS Name, 
        CASE 
            WHEN MenuCountry.ImgURL IS NULL THEN 
                '~/images/flags/ismygolf.png' 
            ELSE 
                MenuCountry.ImgURL 
        END AS FlagImg, 
        AVG(CAST(NewScores.NetScore AS DECIMAL(18, 4))) AS Nett, 
        COUNT(Score.ScoreID) AS Rounds 
    FROM 
        Members 
        INNER JOIN 
        Score 
            ON Members.MemberID = Score.MemberID 
        LEFT OUTER JOIN MenuCountry 
            ON Members.Country = MenuCountry.ID 
    WHERE 
        Members.Status = 1 
    GROUP BY 
        Members.FirstName + ' ' + Members.LastName, 
        MenuCountry.ImgURL
    ) AS Dertbl 
ORDER BY;

该查询是为基于 GridView 的排行榜提供一个结果集，我想要的是只获得不到 3 个月的分数的平均值。如您所见，我将其分为两部分，显然它给出了这样的错误。

消息 4104，第 16 层，状态 1，第 2 行

NewScores.NetScore无法绑定多部分标识符“ ”。

这是因为这个AVG(CAST(NewScores.NetScore AS DECIMAL(18, 4))) AS Nett

我如何制作它以便我可以NewScores在那里使用，所以我只能得到不到 3 个月大的分数的平均值？

编辑：使用人们提供的答案，我通过在正确的位置使用连接解决了它，这是正确的查询：

SELECT ROW_NUMBER() OVER(ORDER BY NETT) AS Rank, Name, FlagImg, Nett, Rounds FROM (SELECT Members.FirstName + ' ' + Members.LastName AS Name, CASE WHEN MenuCountry.ImgURL IS NULL THEN '~/images/flags/ismygolf.png' ELSE MenuCountry.ImgURL END AS FlagImg, AVG(CAST(NewScores.NetScore AS DECIMAL(18, 4))) AS Nett, COUNT(NewScores.ScoreID) AS Rounds FROM Members INNER JOIN (SELECT * FROM Score WHERE InsertedDate >= DATEADD(mm, -5, GETDATE())) NewScores ON Members.MemberID = NewScores.MemberID LEFT OUTER JOIN MenuCountry ON Members.Country = MenuCountry.ID WHERE Members.Status = 1 GROUP BY Members.FirstName + ' ' + Members.LastName, MenuCountry.ImgURL) AS Dertbl ORDER BY Nett ASC
4

3 回答 3

56

NewScores 是 Scores 表的别名 - 看起来您可以按如下方式组合查询：

SELECT 
    ROW_NUMBER() OVER( ORDER BY NETT) AS Rank, 
    Name, 
    FlagImg, 
    Nett, 
    Rounds 
FROM (
    SELECT 
        Members.FirstName + ' ' + Members.LastName AS Name, 
        CASE 
            WHEN MenuCountry.ImgURL IS NULL THEN 
                '~/images/flags/ismygolf.png' 
            ELSE 
                MenuCountry.ImgURL 
        END AS FlagImg, 
        AVG(CAST(NewScores.NetScore AS DECIMAL(18, 4))) AS Nett, 
        COUNT(Score.ScoreID) AS Rounds 
    FROM 
        Members 
        INNER JOIN 
        Score NewScores
            ON Members.MemberID = NewScores.MemberID 
        LEFT OUTER JOIN MenuCountry 
            ON Members.Country = MenuCountry.ID 
    WHERE 
        Members.Status = 1 
        AND NewScores.InsertedDate >= DATEADD(mm, -3, GETDATE())
    GROUP BY 
        Members.FirstName + ' ' + Members.LastName, 
        MenuCountry.ImgURL
    ) AS Dertbl 
ORDER BY;
于 2013-04-12T01:08:10.477 回答
19

WITH如果您的 dbms 支持，您正在寻找的是带有子句的查询。然后

WITH NewScores AS (
    SELECT * 
    FROM Score  
    WHERE InsertedDate >= DATEADD(mm, -3, GETDATE())
)
SELECT 
<and the rest of your query>
;

请注意，;上半场没有。HTH。

于 2013-04-12T01:16:47.043 回答
1

您缺少 table NewScores，因此无法找到。加入这张桌子就行了。

如果你真的想避免直接加入它，你可以替换NewScores.NetScore为 SELECT NetScore FROM NewScores WHERE {conditions on which they should be matched}

于 2013-04-12T01:01:45.643 回答