Lab Week 6 Final David

LabWeek6.sql

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+CREATE DATABASE lab_week_6_final;
+
+USE lab_week_6_final;
+
+CREATE TABLE authors (
+                         id INT AUTO_INCREMENT PRIMARY KEY,
+                         name VARCHAR(100) NOT NULL UNIQUE
+);
+
+CREATE TABLE articles (
+                          id INT AUTO_INCREMENT PRIMARY KEY,
+                          title VARCHAR(255) NOT NULL,
+                          word_count INT NOT NULL CHECK ( word_count > 0 ),
+                          views INT NOT NULL CHECK ( views >= 0 ),
+                          author_id INT,
+                          FOREIGN KEY (author_id) REFERENCES authors(id)
+);
+
+INSERT INTO authors (name) VALUES
+                               ('Maria Charlotte'),
+                               ('Juan Perez'),
+                               ('Gemma Alcocer');
+
+INSERT INTO articles (title, word_count, views, author_id) VALUES
+                                                               ('Best Paint Colors',814,14,1),
+                                                               ('Small Space Decorating Tips',1146,221,2),
+                                                               ('Hot Acessories',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);
+
+CREATE TABLE customers (
+                           id INT AUTO_INCREMENT PRIMARY KEY,
+                           name VARCHAR(100) NOT NULL,
+                           status VARCHAR(20) NOT NULL,
+                           total_mileage INT NOT NULL CHECK ( total_mileage >=0 )
+);
+
+CREATE TABLE aircrafts (
+                           id INT AUTO_INCREMENT PRIMARY KEY,
+                           name VARCHAR(100) NOT NULL UNIQUE,
+                           total_seats INT NOT NULL CHECK ( total_seats >0 )
+);
+
+CREATE TABLE flights (
+                         flight_number VARCHAR(10) PRIMARY KEY,
+                         aircraft_id INT,
+                         mileage INT NOT NULL CHECK ( mileage >0 ),
+                         FOREIGN KEY (aircraft_id) REFERENCES aircrafts (id)
+);
+
+CREATE TABLE bookings (
+                          id INT AUTO_INCREMENT PRIMARY KEY,
+                          customer_id INT,
+                          flight_number VARCHAR(10),
+                          FOREIGN KEY (customer_id) REFERENCES customers(id),
+                          FOREIGN KEY (flight_number) REFERENCES flights(flight_number)
+);
+
+INSERT INTO aircrafts (name, total_seats) VALUES
+                                              ('Boeing 747',400),
+                                              ('Airbus A330',236),
+                                              ('Boeing 777',264);
+
+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 flights (flight_number, aircraft_id, mileage) VALUES
+                                                              ('DL143', 1, 135),
+                                                              ('DL122', 2, 4370),
+                                                              ('DL53', 3, 2078),
+                                                              ('DL222', 3, 1765),
+                                                              ('DL37', 1, 531);
+
+INSERT INTO bookings (customer_id, flight_number) VALUES
+                                                      (1,'DL143'),
+                                                      (1,'DL122'),
+                                                      (2,'DL122'),
+                                                      (3,'DL122'),
+                                                      (3,'DL53'),
+                                                      (3,'DL222'),
+                                                      (4,'DL143'),
+                                                      (4,'DL37'),
+                                                      (5,'DL143'),
+                                                      (5,'DL122'),
+                                                      (6,'DL222'),
+                                                      (7,'DL222'),
+                                                      (8,'DL222');
+
+SELECT COUNT(DISTINCT flight_number) FROM flights;
+SELECT AVG(mileage) FROM flights;
+SELECT AVG(total_seats) FROM aircrafts;
+SELECT status, AVG(total_mileage) FROM customers GROUP BY status;
+SELECT status, MAX(total_mileage) FROM customers GROUP BY status;
+SELECT COUNT(*) FROM aircrafts WHERE name LIKE '%Boeing%';
+SELECT * FROM flights WHERE mileage BETWEEN 300 AND 2000;
+
+SELECT c.status, AVG(f.mileage)
+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;