Normalize and realice qualy

mySecondSQL.sql

@@ -0,0 +1,33 @@
+DROP SCHEMA IF EXISTS blog ;
+CREATE SCHEMA blog ;
+USE blog ;
+
+--
+CREATE TABLE author(
+	id INT NOT NULL AUTO_INCREMENT,
+	author VARCHAR(255),
+	PRIMARY KEY (id)
+);
+
+CREATE TABLE document(
+	title VARCHAR (255) NOT NULL,
+	word_count INT,
+	views INT,
+	author_id INT NOT NULL,
+	PRIMARY KEY(title),
+	FOREIGN KEY (author_id) REFERENCES author(id)
+);
+
+INSERT INTO author (author) VALUES 
+("Maria Charlotte"),
+("Juan Perez"),
+("Gemma Alcocer");
+
+INSERT INTO document (title, word_count, views, author_id) VALUES 
+("Best Paint Colors",814,14,1),
+("Small Space Decorating Tips",1146,221,2),
+("Hot Accessories",986,105,1),
+("Mixing Textures",765,22,1),
+("Kitchen Refresh",1242,307,2),
+("Homemade Art Hacks",1002,193,1),
+("Refinishing Wood Floors",1571,7542,3);

myThirdSQL.sql

@@ -0,0 +1,161 @@
+DROP SCHEMA IF EXISTS airline;
+CREATE SCHEMA airline;
+USE airline;
+
+--
+
+CREATE TABLE customer_name (
+	id INT NOT NULL AUTO_INCREMENT,
+	customer_name VARCHAR(255),
+	PRIMARY KEY (id)
+);
+
+CREATE TABLE customer_status(
+	id INT NOT NULL AUTO_INCREMENT,
+	customer_status VARCHAR(255),
+	PRIMARY KEY (id)
+);
+
+CREATE TABLE flight(
+	id INT NOT NULL AUTO_INCREMENT,
+	flight VARCHAR(255),
+	PRIMARY KEY (id)
+);
+
+CREATE TABLE aircraft(
+	id INT NOT NULL AUTO_INCREMENT,
+	aircraft VARCHAR(255),
+	PRIMARY KEY (id)
+);
+
+CREATE TABLE name_status (
+	id INT NOT NULL AUTO_INCREMENT,
+	id_name INT NOT NULL,
+	id_status INT NOT NULL,
+	PRIMARY KEY (id),
+	FOREIGN KEY (id_name) REFERENCES customer_name(id),
+	FOREIGN KEY (id_status) REFERENCES customer_status(id)
+);
+
+
+
+CREATE TABLE fly(
+	id INT NOT NULL AUTO_INCREMENT,
+	id_name INT NOT NULL,
+	id_flight INT NOT NULL,
+	id_aircraft INT NOT NULL,
+	total_Aircraft_Seats INT,
+	total_Flight_Mileage INT,
+	total_Customer_Mileage INT,
+	PRIMARY KEY(id),
+	FOREIGN KEY (id_name) REFERENCES customer_name(id),
+	FOREIGN KEY (id_flight) REFERENCES flight(id),
+	FOREIGN KEY (id_aircraft) REFERENCES aircraft(id)
+);
+
+-- 
+
+INSERT INTO customer_status (customer_status) VALUES
+("None"),
+("Silver"),
+("Gold");
+
+INSERT INTO customer_name (customer_name) VALUES
+("Agustine Riviera"),
+("Alaina Sepulvida"),
+("Tom Jones"),
+("Sam Rio"),
+("Jessica James"),
+("Ana Janco"),
+("Jennifer Cortez"),
+("Christian Janco");
+
+INSERT INTO name_status (id_name, id_status) VALUES
+(1,2),
+(2,1),
+(3,3),
+(4,1),
+(5,2),
+(6,2),
+(7,3),
+(8,2);
+
+INSERT INTO flight (flight) VALUES
+("DL143"),
+("DL122"),
+("DL53"),
+("DL222"),
+("DL37");
+
+INSERT INTO aircraft (aircraft) VALUES
+("Boeing 747"),
+("Airbus A330"),
+("Boeing 777");
+
+INSERT INTO fly (id_name, id_flight, id_aircraft, 
+total_Aircraft_Seats, total_Flight_Mileage, total_Customer_Mileage) VALUES
+(1,1,1,400,135,115235),
+(1,2,2,236,4370,115235),
+(2,2,2,236,4370,6008),
+(3,2,2,236,4370,205767),
+(3,3,3,264,2078,205767),
+(4,1,1,400,135,2653),
+(3,4,3,264,1765,205767),
+(5,1,1,400,135,127656),
+(6,4,3,264,1765,136773),
+(7,4,3,264,1765,300582),
+(5,2,2,236,4370,127656),
+(4,5,1,400,531,2653),
+(8,4,3,264,1765,14642);
+
+-- 
+
+SELECT COUNT(id_name) AS number_of_flights FROM fly;
+SELECT AVG(total_Flight_Mileage) AS average_flight_distance FROM fly;
+SELECT AVG(total_Aircraft_Seats) AS average_number_seats FROM fly;
+
+SELECT DISTINCT AVG(DISTINCT f.total_Customer_Mileage) AS average_number_miles_flown_by_customers 
+FROM fly AS f 
+JOIN name_status AS n_s ON n_s.id_name = f.id_namefly
+GROUP BY n_s.id_status;
+
+SELECT MAX(f.total_Customer_Mileage) AS max_total_customer_mileage
+FROM fly AS f
+JOIN name_status AS n_s ON n_s.id_name = f.id_name
+GROUP BY n_s.id_status;
+
+SELECT COUNT(f.id) AS number_fly_Boeing
+FROM fly AS f
+JOIN aircraft AS ai ON f.id_aircraft = ai.id
+WHERE ai.aircraft LIKE 'Boeing%';
+
+SELECT DISTINCT ff.flight, f.total_Flight_Mileage AS flight_300_2000
+FROM fly AS f
+JOIN flight AS ff ON ff.id = f.id_flight
+WHERE total_Flight_Mileage BETWEEN 300 AND 2000;
+
+-- SELECT n_s.id_status, SUM(f.total_Flight_Mileage)-- AS average_number_miles_flight 
+-- FROM fly AS f 
+-- JOIN name_status AS n_s ON n_s.id_name = f.id_name
+-- GROUP BY n_s.id_status;
+
+SELECT cs.customer_status,(SUM(f.total_Flight_Mileage)) DIV (COUNT(DISTINCT f.id_name))-- AS average_number_miles_flight 
+FROM fly AS f 
+JOIN name_status AS n_s ON n_s.id_name = f.id_name
+JOIN customer_status AS cs ON cs.id = n_s.id_status
+GROUP BY n_s.id_status;
+
+-- SELECT * 
+-- FROM fly f
+-- JOIN name_status ns ON ns.id_name = f.id_name;
+
+
+SELECT ai.aircraft AS aircraft_most_popular
+FROM fly f
+JOIN name_status ns ON ns.id_name = f.id_name
+JOIN aircraft ai ON f.id_aircraft = ai.id
+WHERE ns.id_status = 3
+GROUP BY ai.id
+ORDER BY COUNT(ai.id) DESC
+LIMIT 1;
+