CREATE TABLE certificate (eid DECIMAL, aid DECIMAL)
CREATE TABLE employee (eid DECIMAL, name TEXT, salary 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)

What is the minimum, average, and maximum distance of all aircrafts.
SELECT MIN(distance), AVG(distance), MAX(distance) FROM aircraft
SELECT MIN("distance"), AVG("distance"), MAX("distance") FROM "aircraft"