CREATE TABLE employee (eid NUMBER, name VARCHAR2, salary NUMBER)
CREATE TABLE aircraft (aid NUMBER, name VARCHAR2, distance NUMBER)
CREATE TABLE flight (flno NUMBER, origin VARCHAR2, destination VARCHAR2, distance NUMBER, departure_date DATE, arrival_date DATE, price NUMBER, aid NUMBER)
CREATE TABLE certificate (eid NUMBER, aid NUMBER)

Show the number of flights in each destination city with a bar chart, order bars in descending order.
SELECT destination, COUNT(destination) FROM flight GROUP BY destination ORDER BY destination DESC
SELECT "destination", COUNT("destination") FROM "flight" GROUP BY "destination" ORDER BY "destination" DESC