CREATE TABLE airports (apid DECIMAL, name TEXT, city TEXT, country TEXT, x DECIMAL, y DECIMAL, elevation DECIMAL, iata TEXT, icao TEXT)
CREATE TABLE airlines (alid DECIMAL, name TEXT, iata TEXT, icao TEXT, callsign TEXT, country TEXT, active TEXT)
CREATE TABLE routes (rid DECIMAL, dst_apid DECIMAL, dst_ap TEXT, src_apid DECIMAL, src_ap TEXT, alid DECIMAL, airline TEXT, codeshare TEXT)

List the cities which have more than one airport and number of airports.
SELECT city, COUNT(*) FROM airports GROUP BY city HAVING COUNT(*) > 1
SELECT "city", COUNT(*) FROM "airports" GROUP BY "city" HAVING COUNT(*) > 1