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

Show all origins and the number of flights from each origin by a bar chart, show by the x axis from low to high.
SELECT origin, COUNT(*) FROM flight GROUP BY origin ORDER BY origin
SELECT "origin", COUNT(*) FROM "flight" GROUP BY "origin" ORDER BY "origin" NULLS FIRST