CREATE TABLE employee (eid DECIMAL, name TEXT, salary DECIMAL)
CREATE TABLE flight (flno DECIMAL, origin TEXT, destination TEXT, distance DECIMAL, departure_date TIME, arrival_date TIME, price DECIMAL, aid DECIMAL)
CREATE TABLE certificate (eid DECIMAL, aid DECIMAL)
CREATE TABLE aircraft (aid DECIMAL, name TEXT, distance DECIMAL)

What are the destinations and number of flights to each one?
SELECT destination, COUNT(*) FROM flight GROUP BY destination
SELECT "destination", COUNT(*) FROM "flight" GROUP BY "destination"