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.
This exercise is part of the course
Introduction to Oracle SQL
Hands-on interactive exercise
Have a go at this exercise by completing this sample code.
-- Select the city, and the customer's full name in one column
SELECT ___
___ || ' ' || ___ customer_1
-- Alias the Customer table as c1
FROM Customer ___