php/mysql-计数和分组

我有一个数据库，里面有玩过的游戏和他们的分数。现在，我想运行一个查询，统计每个球队总进球数超过x（主客场合计）的所有结果

数据库结构：

+----------+----------+---------------+---------------+
| HomeTeam | AwayTeam | HomeTeamGoals | AwayTeamGoals |
+----------+----------+---------------+---------------+
| team1    | team2    |             3 |             1 |
| team3    | team4    |             1 |             2 |
| team1    | team3    |             4 |             4 |
| team4    | team2    |             0 |             1 |
+----------+----------+---------------+---------------+

想要的结果：

+-------+----------+--------------------+
| team  | played   |  games > 3.5 goals |
+-------+----------+--------------------+
| team1 |        2 |                  2 |
| team2 |        2 |                  1 |
| team3 |        2 |                  1 |
| team4 |        2 |                  0 |
+-------+----------+--------------------+

我在看这样的东西：

SELECT *, COUNT(*) AS total FROM games WHERE homeTeamGoals + awayTeamGoals > 3.5 GROUP BY homeTeam

但这只适用于主场比赛，因此我需要一种方法将客场比赛也添加到此中。

• 分别以

  HomeTeam

  和

  AwayTeam

  的形式获取团队的结果
• 使用
• 将结果用作参考

• 根据衍生表中的
  对团队进行分组，以获得结果

请尝试以下操作（）：

---

team4

的预期结果错误。

team4

的任何对手的总目标都不超过3.5。第4队（与第3队）的一场比赛的总目标为3，而另一场（与第2队）的总目标为1，效果完美：）谢谢！同时阅读union all和派生表！

SELECT derived_t.team, 
       SUM(derived_t.played) AS played, 
       SUM(derived_t.games)  AS 'games > 3.5 goals'
FROM 
(
  SELECT t1.HomeTeam as team, 
         COUNT(*) AS played, 
         SUM( IF(t1.HomeTeamGoals + t1.AwayTeamGoals > 3.5, 1, 0) ) AS games  
  FROM your_table AS t1 
  GROUP BY t1.HomeTeam

  UNION ALL 

  SELECT t1.AwayTeam as team, 
         COUNT(*) AS played, 
         SUM( IF(t1.HomeTeamGoals + t1.AwayTeamGoals > 3.5, 1, 0) ) AS games  
  FROM your_table AS t1 
  GROUP BY t1.AwayTeam
) AS derived_t
GROUP BY derived_t.team