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

Show the flight number and distance of the flight with maximum price.
SELECT flno, distance FROM flight ORDER BY price DESC LIMIT 1
SELECT "flno", "distance" FROM "flight" ORDER BY "price" DESC NULLS LAST LIMIT 1