SQL交叉嵌套查询

使用Oracle SQL，我试图写一个声明来回答以下问题：NFL球队赢得的比赛比他们所在分区的平均水平多，他们的罚球场也比分区的平均水平多

我有两个单独的语句可以分别返回（即：一个表列出了获胜次数超过分区平均数的球队，另一个表列出了点球码超过分区平均数的球队）

然而，当我尝试将这两个查询相交时，我遇到了错误。”缺少select关键字是给定的错误

WITH divisionPenaltyYards AS 
(
    SELECT division
        ,avg(penaltyyards) AS AVGPenalty
    FROM nfl.teams
    GROUP BY division
)
WITH divisionWins AS 
(
        SELECT division
            ,avg(wins) AS AVGWins
        FROM nfl.teams
        GROUP BY division
)
SELECT team
FROM nfl.teams
INNER JOIN divisionPenaltyYards 
    ON nfl.teams.division = divisionPenaltyYards.division
WHERE penaltyyards > AVGPenalty

INTERSECT

SELECT team
FROM nfl.teams
INNER JOIN divisionWins 
    ON nfl.teams.division = divisionWins.division
WHERE wins > AVGWins;

编辑：每个请求的更多信息

NFL。球队由NFL中所有球队的统计数据组成。 球队，分区，胜利，惩罚

数据集的一个示例包括

Packers，NFC NORTH，6984

Steelers，AFC NORTH，12817

等等

---

理想的结果将是一个表格，列出所有获胜次数超过分区平均数的球队，同时罚球码数也超过分区平均数。

第二个CTE不应以

和

关键字开头。只需<代码>，即可作为

WITH divisionPenaltyYards AS 
(
    SELECT division
        ,avg(penaltyyards) AS AVGPenalty
    FROM nfl.teams
    GROUP BY division
)
, divisionWins AS 
(
        SELECT division
            ,avg(wins) AS AVGWins
        FROM nfl.teams
        GROUP BY division
)
SELECT team
FROM nfl.teams
INNER JOIN divisionPenaltyYards 
    ON nfl.teams.division = divisionPenaltyYards.division
WHERE penaltyyards > AVGPenalty

INTERSECT

SELECT team
FROM nfl.teams
INNER JOIN divisionWins 
    ON nfl.teams.division = divisionWins.division
WHERE wins > AVGWins;

这里也不需要使用两个CTE

WITH divisionCTE AS 
(
    SELECT division, 
        avg(penaltyyards) as avgpenalty, 
        avg(wins) as avgwins 
    FROM nfl.teams 
    GROUP BY division
)
SELECT team
FROM nfl.teams
INNER JOIN divisionCTE ON nfl.teams.division = divisionCTE.division
WHERE penaltyyards > AVGPenalty

INTERSECT

SELECT team
FROM nfl.teams
INNER JOIN divisionCTE ON nfl.teams.division = divisionCTE.division
WHERE wins > AVGWins; 

此外，INTERSECT在这里工作，但UNION更有意义。但归根结底，两者都不需要：

WITH divisionCTE AS 
(
    SELECT division, 
        avg(penaltyyards) as avgpenalty, 
        avg(wins) as avgwins 
    FROM nfl.teams 
    GROUP BY division
)
SELECT team
FROM nfl.teams
INNER JOIN divisionCTE ON nfl.teams.division = divisionCTE.division
WHERE penaltyyards > AVGPenalty
    AND wins > avgwins

最后，如果要避免连接，可以使用窗口函数：

SELECT team
FROM 
    (
        SELECT team, wins, penaltyyards,
            avg(penaltyyards) OVER (PARTITION BY division) as avgpenalty, 
            avg(wins) OVER (PARTITION BY division) as avgwins 
        FROM nfl.teams 
    ) averages
WHERE penaltyyards > AVGPenalty AND wins > avgwins

---

样本数据和期望的结果将真正帮助其他人了解您正在尝试做什么。您能从您的表格中提供一些样本数据吗？回答得很好，我感谢您的输入。任何能让它以更少的代码工作的东西都是很棒的。1小提示，您在重命名CTE时忘记将join语句中的

DivisionWins

名称更改为

divisionCTE

。否则，这一切都会完美无瑕。啊！我当然知道。我已经修复了这个问题，并增加了一个使用窗口函数执行平均值的选项，这样就可以避免连接。不确定它是否会更快，因为我打赌您的数据相对较小，但它确实是一个很好的简洁查询