Max（）函数不能与Sum（）一起使用

Question

查询（编辑格式）：

SELECT 
    league_id as League, TeamId, MAX(TotalGoals) as Goals,season
FROM
    (SELECT 
        league_id, TeamId, SUM(TeamGoals) AS TotalGoals, season
FROM
    (SELECT 
    league_id,
        season ,
        home_team_api_id AS TeamId,
        SUM(home_team_goal) AS TeamGoals
FROM
    games
GROUP BY TeamId , league_id , season UNION SELECT 
    league_id,
        season,
        away_team_api_id AS TeamId,
        SUM(away_team_goal) AS TeamGoals
FROM
    games
GROUP BY TeamId , league_id , season) t1
GROUP BY TeamId , season) g3
GROUP BY league_id , season;

我对Max（）的回答错误。请告诉我哪里出错了？

Answer 1

您是否也想分享您的SQL表？

我猜你用MAX（）得到了错误的答案，因为MAX（）的来源是来自SUM（）。

您将MAX（TotalGoals）应用为目标，但同时也是SUM（TeamGoals）AS TotalGoals， 显然，TotalGoals是SUM（TeamGoals）的结果，MAX（）函数将变为===＆gt; MAX（SUM（TeamGoals）），它肯定会返回SUM（）的相同结果。

好吧，期待能够分享他们观点的其他开发者......

我复制了SQL并将其格式化为下面的SQL美化器：

SELECT
   league_id as League,
   TeamId,
   MAX(TotalGoals) as Goals,
   season 
FROM
   (
      SELECT
         league_id,
         TeamId,
         SUM(TeamGoals) AS TotalGoals,
         season 
      FROM
         (
            SELECT
               league_id,
               season,
               home_team_api_id AS TeamId,
               SUM(home_team_goal) AS TeamGoals 
            FROM
               games 
            GROUP BY
               TeamId,
               league_id,
               season 
            UNION
            SELECT
               league_id,
               season,
               away_team_api_id AS TeamId,
               SUM(away_team_goal) AS TeamGoals 
            FROM
               games 
            GROUP BY
               TeamId,
               league_id,
               season
         )
         t1 
      GROUP BY
         TeamId,
         season
   )
   g3 
GROUP BY
   league_id,
   season;