MySQL查询 - 2个外键

Question

我有这两个表

airports: airportid, airportname 
flights: flightid, from_airport, to_airport 

其中from_airport和to_airport是外键。

我可以连接的表或者在airportid和from_airport或airportid和to_airport，要么我得到的to_airport或from_airport名字名字，但我想无论是在一个查询或以最低的成本来选择这两个to_airport和from_airport名。

有没有可能？怎么样？？

这里是我的查询：做的时候

SELECT 
flight.idflight, 
flight.idairline, 
flight.from_airport, 
flight.to_airport, 
flight.number, 
airports.name AS origin 
FROM 
flight 
Inner Join airports ON flight.from_airport = airports.idairports 

Answer 1

别名你的表的联接：

SELECT 
    flight.idflight, 
    flight.idairline, 
    flight.from_airport, 
    flight.to_airport, 
    flight.number, 
    airport_from.name AS origin 
    airport_to.name AS destination 
FROM flight 
    INNER JOIN airports airport_from ON flight.from_airport = airport_from.idairports 
    INNER JOIN airports airport_to ON flight.to_airport = airport_to.idairports