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normalizationLab.sql

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+USE normalization_lab;
+
+SELECT COUNT(DISTINCT flight_number) AS total_flights
+FROM flights;
+
+SELECT AVG(mileage) AS avg_flight_distance
+FROM flights;
+
+SELECT AVG(total_seats) AS avg_seats
+FROM aircrafts;
+
+SELECT status, AVG(total_mileage) AS avg_customer_mileage
+FROM customers
+GROUP BY status;
+
+SELECT status, MAX(total_mileage) AS max_customer_mileage
+FROM customers
+GROUP BY status;
+
+SELECT COUNT(*) AS boeing_aircraft_count
+FROM aircrafts
+WHERE name LIKE '%Boeing%';
+
+SELECT *
+FROM flights
+WHERE mileage BETWEEN 300 AND 2000;
+
+SELECT c.status, AVG(f.mileage) AS avg_booked_flight_distance
+FROM bookings b
+JOIN customers c ON b.customer_id = c.id
+JOIN flights f ON b.flight_number = f.flight_number
+GROUP BY c.status;
+
+SELECT a.name, COUNT(*) AS total_bookings
+FROM bookings b
+JOIN customers c ON b.customer_id = c.id
+JOIN flights f ON b.flight_number = f.flight_number
+JOIN aircrafts a ON f.aircraft_id = a.id
+WHERE c.status = 'Gold'
+GROUP BY a.name
+ORDER BY total_bookings DESC
+LIMIT 1;
+
+
+
+
+
+