PSQL：结合/将多个查询结果合并到一个表中

Question

我正在尝试使用4个查询并获取一个结果表。我尝试过UNION和JOIN，但无法做到这一点。如果这里有人可能知道解决方案，我会非常感激。下面是我操作的表格，我正在使用的查询以及我得到的结果。

- 表

   Table "public.games" 
    Column |   Type   | Modifiers 
-----------+-----------------------+----------- 
gamedate | date     | not null 
hometeam | character varying(50) | not null 
awayteam | character varying(50) | not null 
homescore | character varying(50) | 
awayscore | character varying(50) | 
Indexes: 
    "date_teams" PRIMARY KEY, btree (gamedate, hometeam, awayteam) 

- 查询

-- Display teams and their total number of wins and losses 

SELECT homeTeam, count(*) AS Wins 
FROM games 
WHERE homeScore > awayScore 
GROUP BY homeTeam; 

SELECT homeTeam, count(*) AS Losses 
FROM games 
WHERE homeScore < awayScore 
GROUP BY homeTeam; 

SELECT awayTeam, count(*) AS Wins 
FROM games 
WHERE homeScore < awayScore 
GROUP BY awayTeam; 

SELECT awayTeam, count(*) AS Losses 
FROM games 
WHERE homeScore > awayScore 
GROUP BY awayTeam; 

- 结果

hometeam | wins 
------------+------ 
Destroyers | 1 
Animals | 2 
Powerpuff | 1 
Madinights | 1 
(4 rows) 


hometeam | losses 
----------+-------- 
Aliens |  1 
Animals |  1 
(2 rows) 


awayteam | wins 
----------+------ 
Steel | 1 
America | 1 
(2 rows) 


awayteam | losses 
----------+-------- 
Knights |  1 
Bengals |  1 
Fairies |  1 
Beakers |  2 
(4 rows) 

我怎么能把这四张桌子合并为一个，团队名称从不重复？

事情是这样的：

团队|赢得|损失

----------- + ------ + -----

Knights | 0 | 1

动物| 2 | 1

一个表格总结了每个团队的胜利和失败，'家'和'走'是不希望的。

Answer 1

尝试：

SELECT team, 
     SUM(Wins) As Wins, 
     SUM(Losses) As Losses 
FROM (
    SELECT homeTeam As team, 
      SUM(case when homeScore > awayScore then 1 else 0 end) AS Wins, 
      SUM(case when homeScore < awayScore then 1 else 0 end) AS Losses 
    FROM games 
    GROUP BY homeTeam 
    UNION ALL 
    SELECT awayTeam, 
      SUM(case when homeScore < awayScore then 1 else 0 end) AS Wins, 
      SUM(case when homeScore > awayScore then 1 else 0 end) AS Losses 
    FROM games 
    GROUP BY awayTeam 
) q 
GROUP BY team 

演示：http://sqlfiddle.com/#!15/3db10/11

---

一个备注：
您使用<和>运营商在查询 - 这还不包括案件时awayscore=homescore