Self joins
People who love music also love to discuss it or discover new artists. eSymphony is thinking about organizing a meetup to gather customers from a same city. That's not all: they would like to organize a speed meeting session, so that all customers get to speak with each other and exchange at least one artist.
They tasked you with coming up with a list of customer matches per city.
Deze oefening maakt deel uit van de cursus
Introduction to Oracle SQL
Praktische interactieve oefening
Probeer deze oefening eens door deze voorbeeldcode in te vullen.
-- Select city in one column, first and last name in another
SELECT ___
___ || ' ' || ___ customer_1
-- Alias Customer table as c1
FROM Customer ___