Lab 3.02

src/com/ironhack/lab302/airline_db.sql

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+CREATE SCHEMA airline_db;
+USE airline_db;
+
+-- DDL
+
+CREATE TABLE customers (
+	customer_id INT NOT NULL AUTO_INCREMENT,
+	name VARCHAR (255),
+	status VARCHAR (50),
+	total_mileage INT,
+	PRIMARY KEY (customer_id)    
+);
+
+CREATE TABLE aircraft (
+	aircraft VARCHAR (100) NOT NULL,
+	total_seats INT,
+	PRIMARY KEY (aircraft)
+);
+
+CREATE TABLE flights (
+	flight_number VARCHAR (100) NOT NULL,
+	aircraft VARCHAR (100) NOT NULL,
+	flight_mileage INT,
+	PRIMARY KEY (flight_number),
+	FOREIGN KEY (aircraft) REFERENCES aircraft(aircraft)
+);
+
+CREATE TABLE customers_flights (
+	id INT NOT NULL AUTO_INCREMENT,
+	customer_id INT NOT NULL,
+	flight_number VARCHAR (100) NOT NULL,
+	PRIMARY KEY (id),
+	FOREIGN KEY (customer_id) REFERENCES customers(customer_id),
+	FOREIGN KEY (flight_number) REFERENCES flights(flight_number)
+);
+
+-- INSERTS
+
+INSERT INTO customers (name, status, total_mileage) VALUES 
+('Agustine Riviera', 'Silver', 115235),
+('Alaina Sepulvida', 'None', 6008),
+('Tom Jones', 'Gold', 205767),
+('Sam Rio', 'None', 2653),
+('Jessica James', 'Silver', 127656),
+('Ana Janco', 'Silver', 136773),
+('Jennifer Cortez', 'Gold', 300582),
+('Christian Janco', 'Silver', 14642);
+
+INSERT INTO aircraft (aircraft, total_seats) VALUES
+("Boeing 747", 400),
+("Airbus A330", 236),
+("Boeing 777", 264);
+
+INSERT INTO flights (flight_number, aircraft, flight_mileage) VALUES
+("DL143", "Boeing 747", 135),
+("DL122", "Airbus A330", 4370),
+("DL53", "Boeing 777", 2078),
+("DL222", "Boeing 777", 1765),
+("DL37", "Boeing 747", 531);
+
+INSERT INTO customers_flights (customer_id, flight_number) VALUES
+(1, "DL143"),
+(1, "DL122"),
+(2, "DL122"),
+(3, "DL122"),
+(3, "DL53"),
+(4, "DL143"),
+(3, "DL222"),
+(5, "DL143"),
+(6, "DL222"),
+(7, "DL222"),
+(5, "DL122"),
+(4, "DL37"),
+(8, "DL222");
+
+
+-- SQL SCRIPTS
+
+-- 3. Get the total number of flights in the database
+
+SELECT COUNT(*) AS total_flights FROM flights; -- TOTAL TYPES OF FLIGHTS
+
+SELECT COUNT(*) AS total_flights FROM customers_flights; -- TOTAL CUSTOMERS FLIGHTS
+
+-- 4. Get the average flight distance
+
+SELECT AVG(flight_mileage) AS average_flight_distance FROM flights;
+
+-- 5. Get the average number of seats
+
+SELECT AVG(total_seats) AS average_number_seats FROM aircraft;
+
+-- 6. Get the average number of miles flown by customers grouped by status
+
+SELECT AVG(total_mileage) AS average_miles_customer, status 
+FROM customers 
+GROUP BY status;
+
+-- 7. Get the maximum number of miles flown by customers grouped by status
+
+SELECT MAX(total_mileage) AS max_miles_customer, status 
+FROM customers 
+GROUP BY status;
+
+-- 8. Get the total number of aircraft with a name containing Boeing
+
+SELECT COUNT(*) AS total_boeing_aircraft 
+FROM aircraft 
+WHERE aircraft LIKE '%Boeing%';
+
+-- 9. Find all flights with a distance between 300 and 2000 miles
+
+SELECT * 
+FROM flights 
+WHERE flight_mileage BETWEEN 300 AND 2000;
+
+-- 10. Find the average flight distance booked grouped by customer status (this should require a join)
+
+SELECT AVG(f.flight_mileage) AS average_distance, c.status
+FROM customers_flights cf 	
+	LEFT JOIN flights f ON cf.flight_number = f.flight_number
+	LEFT JOIN customers c ON cf.customer_id = c.customer_id
+GROUP BY status;
+
+-- 11. Find the most often booked aircraft by gold status members (this should require a join)
+
+SELECT f.aircraft, COUNT(*) AS flight_count, c.status
+FROM customers_flights cf
+	LEFT JOIN flights f ON cf.flight_number = f.flight_number
+	LEFT JOIN customers c ON cf.customer_id = c.customer_id
+WHERE c.status = 'Gold'
+GROUP BY f.aircraft
+ORDER BY flight_count DESC
+LIMIT 1;
+

src/com/ironhack/lab302/blog_db.sql

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+CREATE SCHEMA blog_db;
+USE blog_db;
+
+CREATE TABLE author (
+	author_id INT NOT NULL AUTO_INCREMENT,
+	author VARCHAR (255),
+	PRIMARY KEY (author_id)	
+);
+
+CREATE TABLE blog (
+	blog_id INT NOT NULL AUTO_INCREMENT,
+	title VARCHAR (255),
+	word_count INT,
+	views INT,
+	author_id INT NOT NULL,
+	PRIMARY KEY (blog_id),
+	FOREIGN KEY (author_id) REFERENCES author(author_id)
+);
+