LeetCode(数据库)- The Airport With the Most Traffic
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AC 代码
WITH t AS(SELECT departure_airport id, flights_count cnt FROM Flights
UNION ALL
SELECT arrival_airport, flights_count FROM Flights),
tt AS(SELECT id, RANK() OVER(ORDER BY SUM(cnt) DESC) rk
FROM t
GROUP BY 1)
SELECT id airport_id
FROM tt
WHERE rk = 1
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