Question

当我尝试执行我的语句时，我收到一条错误，返回“Subquery返回的值超过1。不允许......”，你知道其余的。我对子查询并不擅长，事实上它有时会在试验和错误中猜测，直到我看到我想要收集的结果。任何人都可以向我解释为什么它会因为这个错误而返回？

我试图返回一个人游戏的分数，然后继续从同一个游戏中返回所有玩家。

如果数据相关，则文件在此处：SQL File

SELECT
 TP.intPlayerID
,TP.strLastName + ', ' + TP.strFirstName AS strPlayerName
,TG.*
,TR.intGameID
,(
    SELECT
        CASE WHEN Game.F1S1 = 10 and Game.F2S1 = 10 THEN 20 + Game.F3S1
             WHEN Game.F1S1 = 10 and Game.F2S1 < 10 THEN 10 + Game.F2S1 + Game.F2S2
             WHEN Game.F1S1 + Game.F1S2 = 10 THEN 10 + Game.F2S1
             ELSE Game.F1S1 + Game.F1S2 
             END
        +
        CASE WHEN Game.F2S1 = 10 and Game.F3S1 = 10 THEN 20 + Game.F4S1
             WHEN Game.F2S1 = 10 and Game.F3S1 < 10 THEN 10 + Game.F3S1 + Game.F3S2
             WHEN Game.F2S1 + Game.F2S2 = 10 THEN 10 + Game.F3S1
             ELSE Game.F2S1 + Game.F2S2
             END
        +
        CASE WHEN Game.F3S1 = 10 and Game.F4S1 = 10 THEN 20 + Game.F5S1
             WHEN Game.F3S1 = 10 and Game.F4S1 < 10 THEN 10 + Game.F4S1 + Game.F4S2
             WHEN Game.F3S1 + Game.F3S2 = 10 THEN 10 + Game.F4S1
             ELSE Game.F3S1 + Game.F3S2
             END
        +
        CASE WHEN Game.F4S1 = 10 and Game.F5S1 = 10 THEN 20 + Game.F6S1
             WHEN Game.F4S1 = 10 and Game.F5S1 < 10 THEN 10 + Game.F5S1 + Game.F5S2
             WHEN Game.F4S1 + Game.F4S2 = 10 THEN 10 + Game.F5S1
             ELSE Game.F4S1 + Game.F4S2
             END
        +
        CASE WHEN Game.F5S1 = 10 and Game.F6S1 = 10 THEN 20 + Game.F7S1
             WHEN Game.F5S1 = 10 and Game.F6S1 < 10 THEN 10 + Game.F6S1 + Game.F6S2
             WHEN Game.F5S1 + Game.F5S2 = 10 THEN 10 + Game.F6S1
             ELSE Game.F5S1 + Game.F5S2
             END
        +
        CASE WHEN Game.F6S1 = 10 and Game.F7S1 = 10 THEN 20 + Game.F8S1
             WHEN Game.F6S1 = 10 and Game.F7S1 < 10 THEN 10 + Game.F7S1 + Game.F7S2
             WHEN Game.F6S1 + Game.F6S2 = 10 THEN 10 + Game.F7S1
             ELSE Game.F6S1 + Game.F6S2
             END
        +
        CASE WHEN Game.F7S1 = 10 and Game.F8S1 = 10 THEN 20 + Game.F9S1
             WHEN Game.F7S1 = 10 and Game.F8S1 < 10 THEN 10 + Game.F8S1 + Game.F8S2
             WHEN Game.F7S1 + Game.F7S2 = 10 THEN 10 + Game.F8S1
             ELSE Game.F7S1 + Game.F7S2
             END
        +
        CASE WHEN Game.F8S1 = 10 and Game.F9S1 = 10 THEN 20 + Game.F10S1
             WHEN Game.F8S1 = 10 and Game.F9S1 < 10 THEN 10 + Game.F9S1 + Game.F9S2
             WHEN Game.F8S1 + Game.F8S2 = 10 THEN 10 + Game.F9S1
             ELSE Game.F8S1 + Game.F8S2
             END
        +
        CASE WHEN Game.F9S1 = 10 and Game.F10S1 = 10 THEN 20 + Game.F10S2
             WHEN Game.F9S1 = 10 and Game.F10S1 < 10 THEN 10 + Game.F10S1 + Game.F10S2
             WHEN Game.F9S1 + Game.F9S2 = 10 THEN 10 + Game.F10S1
             ELSE Game.F9S1 + Game.F9S2
             END
        +
        CASE WHEN Game.F10S1 = 10 and Game.F10S2 = 10 THEN 20 + Game.F10S3
             WHEN Game.F10S1 = 10 and Game.F10S2 < 10 THEN 10 + Game.F10S2 + Game.F10S3
             WHEN Game.F10S1 + Game.F10S2 = 10 THEN 10 + Game.F10S3
             ELSE Game.F10S1 + Game.F10S2
             END 
        AS GameScore
    FROM 
        (   
            SELECT
                TR.intGameID
                ,SUM( CASE WHEN TR.intRollIndex = 1 and TR.intRollNumberIndex = 1 THEN TR.intNumberOfPins ELSE 0 END ) F1S1
                ,SUM( CASE WHEN TR.intRollIndex = 1 and TR.intRollNumberIndex = 2 THEN TR.intNumberOfPins ELSE 0 END ) F1S2
                ,SUM( CASE WHEN TR.intRollIndex = 2 and TR.intRollNumberIndex = 1 THEN TR.intNumberOfPins ELSE 0 END ) F2S1
                ,SUM( CASE WHEN TR.intRollIndex = 2 and TR.intRollNumberIndex = 2 THEN TR.intNumberOfPins ELSE 0 END ) F2S2
                ,SUM( CASE WHEN TR.intRollIndex = 3 and TR.intRollNumberIndex = 1 THEN TR.intNumberOfPins ELSE 0 END ) F3S1
                ,SUM( CASE WHEN TR.intRollIndex = 3 and TR.intRollNumberIndex = 2 THEN TR.intNumberOfPins ELSE 0 END ) F3S2
                ,SUM( CASE WHEN TR.intRollIndex = 4 and TR.intRollNumberIndex = 1 THEN TR.intNumberOfPins ELSE 0 END ) F4S1
                ,SUM( CASE WHEN TR.intRollIndex = 4 and TR.intRollNumberIndex = 2 THEN TR.intNumberOfPins ELSE 0 END ) F4S2
                ,SUM( CASE WHEN TR.intRollIndex = 5 and TR.intRollNumberIndex = 1 THEN TR.intNumberOfPins ELSE 0 END ) F5S1
                ,SUM( CASE WHEN TR.intRollIndex = 5 and TR.intRollNumberIndex = 2 THEN TR.intNumberOfPins ELSE 0 END ) F5S2
                ,SUM( CASE WHEN TR.intRollIndex = 6 and TR.intRollNumberIndex = 1 THEN TR.intNumberOfPins ELSE 0 END ) F6S1
                ,SUM( CASE WHEN TR.intRollIndex = 6 and TR.intRollNumberIndex = 2 THEN TR.intNumberOfPins ELSE 0 END ) F6S2
                ,SUM( CASE WHEN TR.intRollIndex = 7 and TR.intRollNumberIndex = 1 THEN TR.intNumberOfPins ELSE 0 END ) F7S1
                ,SUM( CASE WHEN TR.intRollIndex = 7 and TR.intRollNumberIndex = 2 THEN TR.intNumberOfPins ELSE 0 END ) F7S2
                ,SUM( CASE WHEN TR.intRollIndex = 8 and TR.intRollNumberIndex = 1 THEN TR.intNumberOfPins ELSE 0 END ) F8S1
                ,SUM( CASE WHEN TR.intRollIndex = 8 and TR.intRollNumberIndex = 2 THEN TR.intNumberOfPins ELSE 0 END ) F8S2
                ,SUM( CASE WHEN TR.intRollIndex = 9 and TR.intRollNumberIndex = 1 THEN TR.intNumberOfPins ELSE 0 END ) F9S1
                ,SUM( CASE WHEN TR.intRollIndex = 9 and TR.intRollNumberIndex = 2 THEN TR.intNumberOfPins ELSE 0 END ) F9S2
                ,SUM( CASE WHEN TR.intRollIndex = 10 and TR.intRollNumberIndex = 1 THEN TR.intNumberOfPins ELSE 0 END ) F10S1
                ,SUM( CASE WHEN TR.intRollIndex = 10 and TR.intRollNumberIndex = 2 THEN TR.intNumberOfPins ELSE 0 END ) F10S2
                ,SUM( CASE WHEN TR.intRollIndex = 10 and TR.intRollNumberIndex = 3 THEN TR.intNumberOfPins ELSE 0 END ) F10S3
            FROM
                TRolls AS TR
            GROUP BY
                TR.intGameID ) AS Game )
FROM
     TPlayers AS TP
    ,TGames AS TG
    ,TRolls AS TR
WHERE
    TP.intPlayerID = TG.intPlayerID
    AND TG.intGameID = TR.intGameID
    AND TP.intPlayerID = 21

Answer 1

如果没有表格设计，调试有点困难，但从我在查询中看到的情况来看，可能会出现一些问题（同样，取决于您的表格设计）。

您的内部子查询没有Where语句。因此，它将所有游戏带入TROLls表，按intGameID分组;它会返回多个游戏;这可能是“游戏”的问题子查询在SELECT语句中使用，因此它应该只返回一行; 您可能需要在子查询中添加WHERE子句，以及也许是另一个连接，取决于你的表结构和他们的关系。如果你真的需要得到每场比赛的得分（意思是，你还不知道游戏ID）你需要在那里做到这一点 FROM语句（不是像你一样在select语句中），像这样

SELECT TP.intPlayerID ,TP.strLastName + ', ' + TP.strFirstName AS strPlayerName ,TG.* ,TR.intGameID ,Game.Gamescore FROM TPlayers AS TP ,TGames AS TG ,TRolls AS TR , (Select ... ... ) As Game WHERE ...
根据您的问题，我在游戏中了解您有多个玩家。您只是过滤“PlayerID = 21”，因此您要添加所有内容所有游戏中该玩家的得分 - 这是你真正想要的吗？或者您是否缺少过滤特定游戏的其他条件？

你提到你不熟悉子查询，所以这里有一个快速的经验法则：

如果在Select语句中使用（与您的一样），子查询只能返回一排。总是。
如果在From语句中使用（就像我的例子），它会带给你一个具有多行的虚拟“临时表”，将其括起来括号并使用别名来识别它;然后你加入吧使用给定别名的From语句中的其他表。
如果在Where语句中使用它应该返回一个布尔值（true 或者错误的），一个常见的例子是验证是否不是某个地方存在信息，如下：

WHERE EXISTS (SELECT 'X' from .... Where ....)

SQL Server子查询返回错误

1 个答案: