mysql - 在sql中使用join从第三张表中获取数据

Question

我有以下结构的三个表：

Car-Owners                            CarRecords                           Cars

ownerName  ownerID                 ownerID   carID                     carID   carName

我想列出拥有特定汽车（比如本田思域）的所有车主，并显示车名和车主姓名。我对 JOIN 语句不太了解，而且我似乎无法将如何使用它的各个点联系起来。

Answer 1

所以你可能想做的是这样的：

select Car-Owners ownerName, Cars carName 
from Car-Owners, CarRecords, Cars 
 where Car-Owners.ownerId = CarRecords.ownerId 
 and CarRecords.carID = Cars.carId;

从技术上讲，这是一个内部连接，只是它不明确。

Answer 2

SELECT CO.ownerName, C.carName
FROM Car-Owners AS CO
INNER JOIN CarRecords CR ON CO.ownderID = CR.ownerID
INNER JOIN Cars C ON C.carID = CR.carID
WHERE carName = 'Delorean'