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!
Latihan ini adalah bagian dari kursus
Introduction to Relational Databases in SQL
Latihan interaktif praktis
Cobalah latihan ini dengan menyelesaikan kode contoh berikut.
-- Join all tables
SELECT *
FROM affiliations
JOIN ___
ON affiliations.professor_id = professors.___
JOIN organizations
ON affiliations.organization_id = ___.___
JOIN ___
ON professors.___ = universities.id;