Lab finished

lab.sql

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+CREATE DATABASE lab_SQL;
+
+USE lab_SQL;
+DROP TABLE  authors;
+DROP TABLE posts;
+create TABLE authors(
+                        author_id int primary key AUTO_INCREMENT,
+                        name varchar(20) UNIQUE
+);
+INSERT INTO authors VALUES (1 ,'Maria Charlotte');
+INSERT INTO authors VALUES (2 ,'Juan Perez');
+INSERT INTO authors VALUES (3 ,'Gemma Alcocer');
+
+SELECT *FROM authors;
+CREATE TABLE posts(
+                      post_id int primary key AUTO_INCREMENT,
+                      title varchar(50) UNIQUE ,
+                      word_count int,
+                      views int,
+                      author_id int,
+                      FOREIGN KEY (author_id)REFERENCES authors(author_id)
+);
+INSERT INTO posts VALUES(1,'Best Paint Colors',814,14,1);
+INSERT INTO posts VALUES(2,'Small Space Decorating Tips', 1146 , 221,2);
+INSERT INTO posts VALUES (3,'Hot Accessories',986 , 105,1);
+INSERT INTO posts VALUES (4,'Mixing Textures' , 765 , 22,1);
+INSERT INTO posts VALUES (5,'Kitchen Refresh' , 1242 , 307,2);
+INSERT INTO posts VALUES (6,'Homemade Art Hacks' , 1002 , 193,1);
+INSERT INTO posts VALUES (7,'Refinishing Wood Floors' , 1571 , 7542,3);
+
+SELECT *FROM posts;
+
+CREATE TABLE customers(
+                          customer_id int primary key AUTO_INCREMENT,
+                          name varchar(40),
+                          status varchar(20)
+);
+INSERT INTO customers (name, status) VALUES('Agustine Riviera', 'Silver');
+INSERT INTO customers (name, status) VALUES ('Alaina Sepulvida' , 'None');
+INSERT INTO customers (name, status) VALUES('Tom Jones', 'Gold');
+INSERT INTO customers (name, status) VALUES('Sam Rio', 'None');
+INSERT INTO customers (name, status) VALUES('Jessica James', 'Silver');
+INSERT INTO customers (name, status) VALUES('Jennifer Cortez', 'Gold');
+INSERT INTO customers (name, status) VALUES('Ana Janco', 'None');
+INSERT INTO customers (name, status) VALUES('Christian Janco', 'Silver');
+
+ALTER TABLE customers
+    ADD total_customer_mileage INT;
+UPDATE customers SET total_customer_mileage = 115235 WHERE customer_id =1;
+UPDATE customers SET total_customer_mileage = 6008 WHERE customer_id= 2;
+UPDATE customers SET total_customer_mileage = 205767 WHERE customer_id = 3;
+UPDATE customers SET total_customer_mileage = 2653 WHERE customer_id = 4;
+UPDATE customers SET total_customer_mileage = 127656 WHERE customer_id = 5;
+UPDATE customers SET total_customer_mileage = 300582 WHERE customer_id= 6;
+UPDATE customers SET total_customer_mileage = 136773 WHERE customer_id= 7;
+UPDATE customers SET total_customer_mileage = 14642 WHERE customer_id= 8;
+
+;
+
+
+CREATE TABLE flights(
+                        flight_id int primary key AUTO_INCREMENT,
+                        flight_number varchar(10),
+                        flight_mileage int
+);
+INSERT INTO flights (flight_number,flight_mileage) VALUES('DL143',135);
+INSERT INTO flights (flight_number,flight_mileage) VALUES('DL122',4370	);
+INSERT INTO flights (flight_number,flight_mileage) VALUES('DL53',2078	);
+INSERT INTO flights (flight_number,flight_mileage) VALUES('DL222',1765);
+INSERT INTO flights (flight_number,flight_mileage) VALUES('DL37',531);
+
+CREATE TABLE aircrafts(
+                          aircraft_id int primary key AUTO_INCREMENT,
+                          aircraft_name varchar(30),
+                          total_aircraft_seats int
+);
+
+INSERT INTO aircrafts (aircraft_name, total_aircraft_seats) VALUES ('Boeing 747', 400);
+INSERT INTO aircrafts (aircraft_name, total_aircraft_seats) VALUES ('Airbus A330', 236);
+INSERT INTO aircrafts (aircraft_name, total_aircraft_seats) VALUES ('Boeing 777', 264);
+
+DROP TABLE  aircrafts;
+
+CREATE TABLE bookings(
+                         bookings_id int primary key AUTO_INCREMENT,
+                         customer_id int,
+                         flight_id int,
+                         aircraft_id int,
+                         FOREIGN KEY (customer_id) REFERENCES customers(customer_id),
+                         FOREIGN KEY (flight_id) REFERENCES flights(flight_id),
+                         FOREIGN KEY (aircraft_id)REFERENCES aircrafts(aircraft_id)
+);
+
+INSERT INTO bookings(customer_id, flight_id, aircraft_id) VALUES(1,1,1);
+INSERT INTO bookings(customer_id, flight_id, aircraft_id) VALUES(1,2,2);
+INSERT INTO bookings(customer_id, flight_id, aircraft_id) VALUES(2,2,2);
+INSERT INTO bookings(customer_id, flight_id, aircraft_id) VALUES(1,1,1);
+INSERT INTO bookings(customer_id, flight_id, aircraft_id) VALUES(3,2,2);
+INSERT INTO bookings(customer_id, flight_id, aircraft_id) VALUES(3,3,3);
+INSERT INTO bookings(customer_id, flight_id, aircraft_id) VALUES(1,1,1);
+INSERT INTO bookings(customer_id, flight_id, aircraft_id) VALUES(4,1,1);
+INSERT INTO bookings(customer_id, flight_id, aircraft_id) VALUES(1,1,1);
+INSERT INTO bookings(customer_id, flight_id, aircraft_id) VALUES(3,4,3);
+INSERT INTO bookings(customer_id, flight_id, aircraft_id) VALUES(5,1,1);
+INSERT INTO bookings(customer_id, flight_id, aircraft_id) VALUES(4,1,1);
+INSERT INTO bookings(customer_id, flight_id, aircraft_id) VALUES(6,4,3);
+INSERT INTO bookings(customer_id, flight_id, aircraft_id) VALUES(7,4,3);
+INSERT INTO bookings(customer_id, flight_id, aircraft_id) VALUES(5,2,2);
+INSERT INTO bookings(customer_id, flight_id, aircraft_id) VALUES(4,5,1);
+INSERT INTO bookings(customer_id, flight_id, aircraft_id) VALUES(8,4,3);
+
+SELECT *FROM bookings;
+
+SELECT COUNT(DISTINCT flight_number) FROM flights;
+
+SELECT AVG(flights.flight_mileage) FROM flights;
+
+SELECT AVG(total_aircraft_seats) FROM aircrafts;
+
+SELECT status, AVG(customers.total_customer_mileage) FROM customers GROUP BY status;
+
+SELECT status, MAX(customers.total_customer_mileage) FROM customers GROUP BY status;
+
+SELECT COUNT(*) FROM aircrafts WHERE aircrafts.aircraft_name LIKE '%Boeing%';
+
+SELECT * FROM flights WHERE flights.flight_mileage BETWEEN 300 AND 2000;
+
+SELECT c.status, AVG(f.flight_mileage)
+FROM bookings b
+         JOIN customers c ON b.customer_id = c.customer_id
+         JOIN flights f ON b.flight_id = f.flight_id
+GROUP BY c.status;
+
+
+SELECT a.aircraft_name, COUNT(*) AS total_bookings
+FROM bookings b
+         JOIN customers c ON b.customer_id = c.customer_id
+         JOIN flights f ON b.flight_id = f.flight_id
+         JOIN aircrafts a ON b.aircraft_id = a.aircraft_id
+WHERE c.status = 'Gold'
+GROUP BY a.aircraft_name
+ORDER BY total_bookings DESC
+    LIMIT 1;
+
+