LAB WEEK 6 MYSQL

AIrline.sql

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+CREATE DATABASE airline_db;
+
+USE airline_db;
+
+CREATE TABLE customers(
+    id INT AUTO_INCREMENT PRIMARY KEY,
+    customer_name varchar(50),
+    status varchar(50),
+    total_mileage INT
+);
+
+CREATE TABLE aircrafts(
+    id INT AUTO_INCREMENT PRIMARY KEY,
+    name varchar(50),
+    total_seats INT
+);
+
+CREATE TABLE flights
+(
+    flight_number  varchar(5) PRIMARY KEY ,
+    mileage INT,
+    aircraft_id    INT,
+    FOREIGN KEY (aircraft_id) REFERENCES aircrafts(id)
+);
+
+CREATE TABLE bookings
+(
+    id INT AUTO_INCREMENT PRIMARY KEY,
+    customer_id INT,
+    flight_number varchar(5),
+    FOREIGN KEY (flight_number) REFERENCES flights(flight_number),
+    FOREIGN KEY (customer_id) REFERENCES customers(id)
+);
+
+INSERT INTO customers(id, customer_name, status, total_mileage)
+    VALUES
+        (1,'Agustine Riviera','Silver',115235),
+        (2,'Alaina Sepulvida','None',6008),
+        (3,'Tom Jones','Gold',205767),
+        (4,'Jessica James','Silver',127656),
+        (5,'Sam Rio','None',2653),
+        (6,'Ana Janco','Silver',136773),
+        (7,'Jennifer Cortez','Gold',300582),
+        (8,'Christian Janco','Silver',14642)
+;
+
+INSERT INTO aircrafts(id, name, total_seats)
+    VALUES
+        (1,'Boeing 747',400),
+        (2,'Airbus A330',236),
+        (3,'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(id, customer_id, flight_number)
+    VALUES
+        (1, 1, 'DL143'),
+        (2, 1, 'DL122'),
+        (3, 2, 'DL122'),
+        (4, 1, 'DL143'),
+        (5, 3, 'DL122'),
+        (6, 3, 'DL53'),
+        (7, 1, 'DL143'),
+        (8, 4, 'DL143'),
+        (9, 1, 'DL143'),
+        (10, 3, 'DL222'),
+        (11, 5, 'DL143'),
+        (12, 4, 'DL143'),
+        (13, 6, 'DL222'),
+        (14, 7, 'DL222'),
+        (15, 5, 'DL122'),
+        (16, 4, 'DL37'),
+        (17, 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;

Books.sql

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+CREATE DATABASE book_db;
+
+USE book_db;
+
+CREATE TABLE author
+(
+    id     int AUTO_INCREMENT PRIMARY KEY,
+    author varchar(50)
+);
+CREATE TABLE books
+(
+    id         int AUTO_INCREMENT PRIMARY KEY,
+    author_id  int,
+    title      varchar(50),
+    word_count int,
+    views      int,
+        FOREIGN KEY (author_id) REFERENCES author (id)
+);
+
+INSERT INTO author(id, author)
+    VALUES
+        (1,'Maria Charlotte'),
+        (2,'Juan Perez'),
+        (3,'Gemma Alcocer')
+;
+
+INSERT INTO books(id, author_id, title, word_count, views)
+    VALUES
+        (1,1,'Best Paint Colors',814,14),
+        (2,2,'Small Space Decorating Tips',1146,221),
+        (3,1,'Hot Accessories',986,105),
+        (4,1,'Mixing Textures',765,22),
+        (5,1,'Homemade Art Hacks',1002,193),
+        (6,3,'Refinishing Wood Floors',1571,7542)
+