Warning! The page was not fully loaded, probably because of a network issue. It could be that not all functionalities work as expected. Please try reloading the page.

Drop links or images here to add them to the editor.

Database schema

Output

Oef 4.3

Schrijf een query die bovenstaande output als resultaat geeft.

Algeme vorm queries: SELECT … FROM … WHERE … GROUP BY … HAVING … ORDER BY … ; (het is mogelijk dat je niet alle keywords nodig hebt).