Question

Let’s assume that I have 2 tables: Human, Car.
Table Car has some columns and one of them is Human_id. For example, like this:

Human_id Type
1        BMW
5        Mercedes
1        Audi
2        Peugeot
3        BMW
2        JEEP

How can I select all humans who have more than one car? I mean I need to control if Human_id is used more than once in the Human_id column. But how I can do that?

SELECT human.name
FROM Human, Car
WHERE .... <- what goes here??

Answer 1

SELECT human.name, car.human_id, count(*) as total
FROM Human, Car
group by human.name, car.human_id
having count(*) > 1