php - SQL查询未返回特定结果

Question

我正在尝试创建查询以不包含part_id =“1”的汽车。这可行，但汽车继续显示，因为 car_id 与多个其他 part_id 关联。

这是我的查询:

SELECT
    distinct car.car_id, 
             part.description
FROM car
JOIN car_parts part on (car.car_id = part.car_id)
WHERE part.part_id <> '1'

我的表:car_parts

Car ID | Part ID
   1        1
   1        3
   1        4
   2        2
   2        5
   2        7
   3        1
   3        4
   3        9
   4        1

查询应返回的唯一 car_id 是 car_id = 2。

Answer 1

SELECT distinct car.car_id, part.description
FROM car
JOIN car_parts part on (car.car_id = part.car_id)
WHERE part.part_id <> '1'
AND car.car_id not in ( select car_id from part where part = 1 )