跨多个列的 SQL 联接

Question

我正在 SQLite 中创建一个数据库来记录比赛结果和 SQL 查询，然后显示数据。

我有一张用于赛车手的桌子和一张用于结果的桌子。

赛车手

racerID	racerName
1	Mark
2	Simon
3	Geoff

结果

resultID	1st	2nd	3rd
1	1	2	3
2	2	3	1
3	1	3	2

如何在所有位置显示姓名而不是只显示他们的 ID？

resultID	1st	2nd	3rd
1	Mark	Simon	Geoff
2	Simon	Geoff	Mark
3	Mark	Geoff	Simon

我已经设法让它为第 1 列工作。

select Racers.racerName as "1st", Results."2nd",Results."3rd"
from Results
inner join Racers on Results."1st"=Racers.racerID;

但是当我尝试以类似的方式获取其他列时，我得到了一个错误。

select Racers.racerName as "1st", Racers.racerName as "2nd",Racers.racerName as "3rd"
from Results
inner join Racers on Results."1st"=Racers.racerID
inner join Racers on Results."2nd"=Racers.racerID
inner join Racers on Results."3rd"=Racers.racerID;

我确定我忽略了一些非常基本的东西，但不知道如何克服这个问题。

提前致谢。

Answer 1

您需要为每个表引用使用单独的别名：

select r1.racerName as "1st", r2.racerName as "2nd", r3.racerName as "3rd"
from Results r join
     Racers r1
     on r."1st" = r1.racerID join
     Racers r2 
     on r."2nd" = r2.racerID join
     Racers r3
     on r."3rd" = r3.racerID;