如何在PostgreSQL中将两行合并为一行？

我以这种方式从postgres中的两个表中选择数据：

SELECT matches.id id, first_team_id T1, second_team_id T2, name 
FROM matches 
JOIN teams ON matches.first_team_id = teams.id 
UNION 
SELECT matches.id id, first_team_id T1, second_team_id T2, name 
FROM matches 
JOIN teams ON matches.second_team_id = teams.id

这就是我的桌子现在的样子： 这就是我需要的

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我需要最简单的方法。我在类似的问题中看到了一些解决方案，但我没有设法解决它们。请帮助我

通过两个连接，您可以做您想做的事情：

select m.id, m.first_team_id, m.second_team_id, t1.name, t2.name
from matches m join
     teams t1
     on m.first_team_id = t1.id join
     teams t2
     on m.second_team_id = t2.id;

id  T1  T2  name1  name2
1   1   2   Team1  Team2
2   1   3   Team2  Team1

select m.id, m.first_team_id, m.second_team_id, t1.name, t2.name
from matches m join
     teams t1
     on m.first_team_id = t1.id join
     teams t2
     on m.second_team_id = t2.id;