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Author: alexoliveros92

SQLQuery_SQL_CQL_Comparison.sql

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+--use flightsDB
+--go
+
+--1. Delay general report by airline
+
+--SQL SERVER (SQL)
+SELECT f.flight_ID as [Fligth ID], f.date as [Date], f.Flight_number as [Flight Number], 
+f.origin_airport as [Origin Airport], f.Departure_delay as [Departure delay], f.destination_airport as [Destination Airport], f.Arrival_delay as [Arrival delay],
+f.delay, ROUND(((f.Departure_delay)+(f.Arrival_delay))/2,0) as [Average delay], al.Airline
+FROM airport a
+INNER JOIN flights f
+ON a.airport_code = f.destination_airport
+INNER JOIN airlines al
+ON al.airline_code = f.airline_code
+WHERE al.Airline_code='AA' 
+ORDER BY [Average delay] DESC;
+
+--NEO4J (CQL)
+/*
+MATCH (a:Airport)<-[:LANDS_AT]-(f:Flight)-[:OPERATED_BY]->(al:Airlines)
+WHERE al.id = 'AA'
+RETURN f.id as `Fligth ID`, f.date as `Date`, f.flight_number as `Flight Number`,
+       f.origin_airport as `Origin Airport`, f.departure_delay as `Departure delay`,
+       f.destination_airport as `Destination Airport`, f.arrival_delay as `Arrival delay`,
+       f.delay, toInteger((f.departure_delay + f.arrival_delay) / 2) as `Average delay`,
+       al.airline as `Airline`
+ORDER BY `Average delay` DESC
+*/
+
+
+--2. Number of flights by airport
+
+--SQL SERVER (SQL)
+SELECT f.origin_airport as Airport, a.airport, COUNT(f.origin_airport) AS num_flights
+FROM flights f
+INNER JOIN airport a
+ON f.origin_airport = a.airport_code
+GROUP BY f.origin_airport, a.airport
+ORDER BY num_flights DESC;
+
+--NEO4J (CQL)
+/*
+MATCH (f:Flight)-[:TAKES_OFF_FROM]->(a:Airport)
+RETURN f.origin_airport as Airport, a.airport as airport, count(f.origin_airport) as num_flights
+ORDER BY num_flights DESC
+*/
+
+
+--3. What airlines are using the flight number 1495 and where?
+
+--SQL SERVER (SQL)
+SELECT DISTINCT flights.date, airlines.airline
+FROM flights
+JOIN airlines
+ON flights.airline_code = airlines.airline_code
+WHERE flights.flight_number = '1495';
+
+--NEO4J (CQL)
+
+/*
+MATCH (f:Flight)-[:OPERATED_BY]->(a:Airlines)
+WHERE f.flight_number = 1495
+RETURN DISTINCT f.date as date, a.id as airline
+*/
+
+
+--4.TOP 5 ailines with more delayed flights
+
+--SQL SERVER (SQL)
+SELECT TOP 5 COUNT(*) AS num_delays, al.airline_code, al.airline
+FROM flights
+inner join airlines al
+ON flights.airline_code = al.airline_code
+WHERE flights.delay_minutes > 0
+GROUP BY al.airline_code, al.airline
+ORDER BY num_delays DESC;
+
+--NEO4J (CQL)
+
+/*
+MATCH (f:Flight)-[:OPERATED_BY]->(a:Airlines)
+WHERE f.delay_minutes > 0
+WITH COUNT(*) AS num_delays, a.id AS airline_code, a.airline AS airline
+ORDER BY num_delays DESC
+RETURN airline_code, airline, num_delays
+LIMIT 5
+*/
+
+
+--5. Which airline has the highest average delay time for flights departing from New York's JFK airport?
+
+--SQL SERVER (SQL)
+SELECT TOP 5 al.airline, AVG(f.departure_delay) AS avg_delay
+FROM airlines al
+INNER JOIN flights f
+ON al.airline_code = f.airline_code
+WHERE f.origin_airport = 'JFK' AND f.departure_delay IS NOT NULL
+GROUP BY airline
+ORDER BY avg_delay DESC
+
+--NEO4J (CQL)
+
+/*
+MATCH (a:Airlines)<-[:OPERATED_BY]-(f:Flight {origin_airport: 'JFK'})
+WHERE f.departure_delay IS NOT NULL
+WITH a.airline AS airline, AVG(f.departure_delay) AS avg_delay
+ORDER BY avg_delay DESC
+RETURN airline, avg_delay
+LIMIT 5
+*/
+
+--6. Average distance trip by airline
+
+--SQL SERVER (SQL)
+SELECT f.airline_code, a.airline, avg(f.distance) as Average_distance
+FROM flights f
+INNER JOIN airlines a
+ON a.airline_code=f.airline_code
+GROUP BY f.airline_code, a.airline
+ORDER BY Average_distance DESC
+
+--NEO4J (CQL)
+
+/*
+MATCH (a:Airlines)<-[:OPERATED_BY]-(f:Flight)
+WITH a.id AS airline_code, a.airline AS airline, AVG(f.distance) AS average_distance
+ORDER BY average_distance DESC
+RETURN airline_code, airline, average_distance
+*/
+
+--7. Cancellation percentage per airline
+
+--SQL SERVER (SQL)
+SELECT f.airline_code, a.airline,
+       (COUNT(CASE WHEN f.delay_id != 'N' THEN 1 END)) as Delayed,
+	   COUNT(*) as Total_flights,
+	   ROUND(CAST(COUNT(CASE WHEN f.delay_id != 'N' THEN 1 END) AS FLOAT) / COUNT(*),2) * 100 as [Delay percentage (%)]
+FROM flights f
+INNER JOIN airlines a
+ON a.airline_code=f.airline_code
+GROUP BY f.airline_code, a.airline
+ORDER BY [Delay percentage (%)] DESC
+
+/*
+MATCH (f:Flight)-[:OPERATED_BY]->(a:Airlines)
+WITH a.id AS airline_code, a.airline AS airline,
+     COUNT(CASE WHEN f.delay_id <> 'N' THEN 1 END) AS delayed,
+     COUNT(*) AS total_flights
+RETURN airline_code, airline, delayed, total_flights, (toFloat(delayed) / total_flights) * 100 AS `Delay percentage (%)`
+ORDER BY (`Delay percentage (%)`) desc
+LIMIT 5
+*/