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

Draw a bar chart of destination versus the total number, sort Y in asc order.
SELECT destination, COUNT(*) FROM flight GROUP BY destination ORDER BY COUNT(*)
SELECT "destination", COUNT(*) FROM "flight" GROUP BY "destination" ORDER BY COUNT(*) NULLS FIRST