将一行中的两个ID与另一张表连接起来

Question

I got two tables...

fixtures

and teams

Now I would like to display the names of both teams (lteam and vteam) playing against each other in a table. I have tried to LEFT JOIN those tables, but that does not work. Guess you know why?

SELECT * FROM fixtures 

LEFT JOIN teams as a ON fixtures.lteam = teams.id
LEFT JOIN teams as b ON fixtures.vteam = teams.id

WHERE date_ko = '2017-05-19'

Thanks for your help!

Answer 1

The joins are not correct. Change this:

LEFT JOIN teams as a ON fixtures.lteam = teams.id
LEFT JOIN teams as b ON fixtures.vteam = teams.id
                                            |

To this:

LEFT JOIN teams as a ON fixtures.lteam = a.id
LEFT JOIN teams as b ON fixtures.vteam = b.id
                                         |

You need to use the alias in the join too