如何在连接两个具有匹配ID的表时添加来自特定字段的列?
问题描述:
我有2个表,汽车和经销商。如何在连接两个具有匹配ID的表时添加来自特定字段的列?
CARS: id, make, model, year, dealership_id
DEALERSHIPS: id, name, address
汽车有一个dealerhip_id属性,但不是经销商名称。如果cars.dealership_id和dealership.id匹配,如何在加入表格时添加经销商名称?
这是我到目前为止有:
SELECT cars.make, cars.model, cars.year
FROM cars
JOIN dealerships cars ON cars.dealership_id = dealership.id
答
这个怎么样?
SELECT cars.make, cars.model, cars.year, dealerships.name
FROM cars
JOIN dealerships ON cars.dealership_id = dealerships.id
谢谢,完美的工作 – cvDv