列字段加入Mysql查询

Question

我有两张如下表：

表1 ：

teamid  teamname
 1      AAA
 2      BBB
 3      CCC

表2 ：

id  team1   team2
1    1       2
2    2       3          
3    1       3

表2包含两个字段 team1 和 team2 ，引用table1 teamid 。

预期结果：

id  team1   team2   
1    AAA     BBB
2    BBB     CCC
3    AAA     CCC

Answer 1

您需要加入table1 2次

select 
t2.id,
t1.teamname as team1,
t11.teamname as team2
from table2 t2
join table1 t1 on t1.teamid = t2.team1
join table1 t11 on t11.teamid = t2.team2