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WITH tmp AS ( SELECT airport_name->>'en' AS departure_airport, arrival_airport AS arrival_airports FROM airports_data ad JOIN flights f ON ad.airport_code = f.departure_airport ) SELECT departure_airport, json_agg(DISTINCT ad2.airport_name->>'en' ORDER BY ad2.airport_name->>'en') AS arrival_airports FROM tmp JOIN airports_data ad2 ON airport_code = arrival_airports GROUP BY departure_airport ORDER BY departure_airport

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