将一个MYSQL表中的单个记录连接到第二个中的两个记录

Question

I have two MYSQL tables, teams and fixtures. They look like this...

TEAMS
   team_id   |   team   
---------------------------------
      1      | Manchester United  
      2      | Liverpool  
      3      | Chelsea

FIXTURES
fixture_id  |    date    |  home_team_id   |   away_team_id   
--------------------------------------------------------------
    1       | 2014-01-06 |       1         |        2 
    2       | 2014-02-06 |       2         |        3  
    3       | 2014-03-06 |       3         |        1

What I am trying to do is write a query that produces a result like...

   fixture_id  |   date     |  home_team         |   away_team   
--------------------------------------------------------------------------
       1       | 2014-01-06 |  Manchester United |   Liverpool 
       2       | 2014-02-06 |  Liverpool         |   Chelsea 
       3       | 2014-03-06 |  Chelsea           |   Manchester United

How do I join both the home_team_id and away_team_id in a single fixtures table to two team_id records in the teams table?

Thanks for your help

Jules

Answer 1

You need to JOIN TEAMS two times something as

select 
f.fixture_id,
f.date,
t1.team as home_team,
t2.team as away_team
from FIXTURES f
join TEAMS t1 on t1.team_id = f.home_team_id
join TEAMS t2 on t2.team_id = f.away_team_id

Answer 2

You just need to join to the TEAMS table twice, like so:

select fixture_id, date, h.team as home_team, a.team as away_team
from fixtures f
inner join teams h on f.home_team_id = h.team_id
inner join teams a on f.away_team_id = a.team_id

Answer 3

This should solve your problem. Join the team table to times to the FIXTURES table

select fixture_id,date,hometeam.team,awayteam.team from    FIXTURES join TEAMS hometeam on home_team_id = hometeam.id join TEAMS awayteam on home_team_id = awayteam.id