SELECT departure_airport, actual_departure FROM flights
WHERE departure_airport = 'DME' AND actual_departure::DATE = '2017-08-01'
ORDER BY actual_departure LIMIT 10;
;
select * from query_cost('SELECT departure_airport, actual_departure FROM flights
WHERE departure_airport = ''DME'' AND actual_departure::DATE = ''2017-08-01''
ORDER BY actual_departure LIMIT 10;');