Join all the tables together
In this last exercise, your task is to find the university city of the professor with the most affiliations in the sector "Media & communication".
For this,
- you need to join all the tables,
- group by some column,
- and then use selection criteria to get only the rows in the correct sector.
Let's do this in three steps!
This exercise is part of the course
Introduction to Relational Databases in SQL
Hands-on interactive exercise
Have a go at this exercise by completing this sample code.
-- Join all tables
SELECT *
FROM affiliations
JOIN ___
ON affiliations.professor_id = professors.___
JOIN organizations
ON affiliations.organization_id = ___.___
JOIN ___
ON professors.___ = universities.id;