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Command SQLtest.online
Get statistics on flights departing from Domodedovo Airport (DME) in August 2017. Output the result as a table with columns: count_departed - the total number of flights departing from the airport, count_delayed - the number of delayed flights (a flight that actually took off more than half an hour later than scheduled is considered delayed) and delayed_flights_rate - percentage of delayed flights rounded to two decimal places.
Use PostgreSQL syntax to write your answer. Descriptions of tables are provided in the right pane.
Write your request in the field below and click the "Check it!" button.ER diagram of the Bookings database
aircraft_code | model | range | |
---|---|---|---|
1 | 773 | {"en": "Boeing 777-300", "ru": "Боинг 777-300"} | 11100 |
airport_code | airport_name | city | coordinates | timezone | |
---|---|---|---|---|---|
1 | YKS | {"en": "Yakutsk Airport", "ru": "Якутск"} | {"en": "Yakutsk", "ru": "Якутск"} | (129.77099609375,62.0932998657227) | Asia/Yakutsk |
ticket_no | flight_id | boarding_no | seat_no | |
---|---|---|---|---|
1 | 0005435212351 | 30625 | 1 | 2D |
book_ref | book_date | total_amount | |
---|---|---|---|
1 | 00000F | 2017-07-05 00:12:00+00 | 265700.00 |
flight_id | flight_no | scheduled_departure | scheduled_arrival | departure_airport | arrival_airport | status | aircraft_code | actual_departure | actual_arrival | |
---|---|---|---|---|---|---|---|---|---|---|
1 | 1185 | PG0134 | 2017-09-10 06:50:00+00 | 2017-09-10 11:55:00+00 | DME | BTK | Scheduled | 319 |
aircraft_code | seat_no | fare_conditions | |
---|---|---|---|
1 | 319 | 2A | Business |
ticket_no | flight_id | fare_conditions | amount | |
---|---|---|---|---|
1 | 0005432159776 | 30625 | Business | 42100.00 |
ticket_no | book_ref | passenger_id | passenger_name | contact_data | |
---|---|---|---|---|---|
1 | 0005432000987 | 06B046 | 8149 604011 | VALERIY TIKHONOV | {"phone": "+70127117011"} |