Question

I have this question, from I am trying to get through. I have been trying to do this for hours, it would be really great if someone could point us in the right direction.

This is in german so I am going to translate it in English:

We only have problem with part (d)

(d) Write an SQL statement that gives names of the restaurant and Ort(Place) of the restaurant that do not order any Salat.

The expected result would be:

Da Mafia : Göttingen
Venezia : Kassel

Answer 1

You can try like this:

  SELECT name,ort FROM kunde WHERE name NOT IN (SELECT DISTINCT(pizzeria) FROM Liefervertrag WHERE product='salat')