Question

我使用Oracle SQL，试图写一个回答以下问题的语句：胜率高于分区平均数的NFL球队也具有比分区平均数更多的罚球数。

我有两个单独的语句，每个语句都可以单独返回（即：一个表，该表列出了获胜次数多于分区平均数的球队，另一个表中列出了获胜率高于平均数的球队）

但是，当我尝试将两个查询相交时，我遇到了错误。错误是“缺少选择关键字”。

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.Teams由NFL中所有球队的统计数据组成。球队，分区，胜利，罚球场……

数据集的示例包括 Packers, NFC NORTH, 6, 984 Steelers, AFC NORTH, 12, 817 等等。

期望的结果将是一张表格，列出所有获胜次数超过分区平均数的球队，同时还拥有比分区平均数更多的罚码。

Answer 1

第二个CTE不应以holder.itemView.findViewById(R.id.my_view);关键字开头。只是WITH

, divisionWins AS

这里也不需要使用两个CTE。

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;

此外，INTERSECT在这里工作，但UNION会更有意义。最终，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

INTERSECT

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

最后，如果您想避免JOIN，则可以使用窗口函数：

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

SQL相交嵌套查询

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