Week 6 Lab - Completed

lab.sql

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+DROP DATABASE IF EXISTS BlogDB;
+CREATE DATABASE BlogDB;
+USE BlogDB;
+
+
+CREATE TABLE Authors (
+author_id INT PRIMARY KEY AUTO_INCREMENT,
+author_name VARCHAR(100) NOT NULL UNIQUE
+);
+
+
+CREATE TABLE Articles (
+article_id INT PRIMARY KEY AUTO_INCREMENT,
+title VARCHAR(255) NOT NULL,
+word_count INT NOT NULL,
+views INT NOT NULL,
+author_id INT NOT NULL,
+FOREIGN KEY (author_id) REFERENCES Authors(author_id) ON DELETE CASCADE
+);
+
+
+INSERT INTO Authors (author_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 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);
+
+
+DROP DATABASE IF EXISTS AirlineDB;
+CREATE DATABASE AirlineDB;
+USE AirlineDB;
+
+-- Customers Table
+CREATE TABLE Customers (
+customer_id INT PRIMARY KEY AUTO_INCREMENT,
+customer_name VARCHAR(100) NOT NULL,
+customer_status VARCHAR(20),
+total_mileage INT NOT NULL
+);
+
+
+CREATE TABLE Aircrafts (
+aircraft_id INT PRIMARY KEY AUTO_INCREMENT,
+aircraft_name VARCHAR(100) NOT NULL UNIQUE,
+total_seats INT NOT NULL
+);
+
+
+CREATE TABLE Flights (
+flight_id INT PRIMARY KEY AUTO_INCREMENT,
+flight_number VARCHAR(10) NOT NULL UNIQUE,
+mileage INT NOT NULL,
+aircraft_id INT NOT NULL,
+FOREIGN KEY (aircraft_id) REFERENCES Aircrafts(aircraft_id)
+);
+
+
+CREATE TABLE Bookings (
+booking_id INT PRIMARY KEY AUTO_INCREMENT,
+customer_id INT NOT NULL,
+flight_id INT NOT NULL,
+FOREIGN KEY (customer_id) REFERENCES Customers(customer_id) ON DELETE CASCADE
+FOREIGN KEY (flight_id) REFERENCES Flights(flight_id) ON DELETE CASCADE
+);
+
+
+INSERT INTO Customers (customer_name, customer_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 Aircrafts (aircraft_name, total_seats) VALUES
+('Boeing 747', 400),
+('Airbus A330', 236),
+('Boeing 777', 264);
+
+
+INSERT INTO Flights (flight_number, mileage, aircraft_id) VALUES
+('DL143', 135, 1),
+('DL122', 4370, 2),
+('DL53', 2078, 3),
+('DL222', 1765, 3),
+('DL37', 531, 1);
+
+
+INSERT INTO Bookings (customer_id, flight_id) VALUES
+(1,1),
+(1,2),
+(2,2),
+(3,2),
+(3,3),
+(3,4),
+(4,1),
+(4,5),
+(5,1),
+(5,2),
+(6,4),
+(7,4),
+(8,4);
+
+
+USE AirlineDB;
+
+SELECT COUNT(*) AS total_flights FROM Flights;
+
+SELECT AVG(mileage) AS avg_distance FROM Flights;
+
+SELECT AVG(total_seats) AS avg_seats FROM Aircrafts;
+
+SELECT customer_status, AVG(total_mileage) AS avg_miles
+FROM Customers
+GROUP BY customer_status;
+
+SELECT customer_status, MAX(total_mileage) AS max_miles
+FROM Customers
+GROUP BY customer_status;
+
+SELECT COUNT(*) AS boeing_count
+FROM Aircrafts
+WHERE aircraft_name LIKE '%Boeing%';
+
+SELECT *
+FROM Flights
+WHERE mileage BETWEEN 300 and 2000;
+
+SELECT c.customer_status, AVG(f.mileage) AS avg_booked_distance
+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.customer_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 f.aircraft_id = a.aircraft_id
+WHERE c.customer_status = 'Gold'
+GROUP BY a.aircraft_name
+ORDER BY total_bookings DESC
+    LIMIT 1;