initial work on example schema

lab-2/music-store-app/sql/schema.sql

+/* Delete existing tables in reverse order of creation
+so as not to violate any foreign key constraints */
+DROP TABLE IF EXISTS OrderLine, Order, Customer, Track, Album, Artist, Act, Genre;
+
+/* Define table for genres */
+CREATE TABLE Genre (
+	id INT AUTO_INCREMENT,
+	name VARCHAR(25) UNIQUE NOT NULL,
+	PRIMARY KEY (id)
+}
+	
+
+/* Define table for storing act (i.e. a group or solo artist) */
+CREATE TABLE Act (
+	id INT AUTO_INCREMENT,
+	name VARCHAR(50) NOT NULL,
+	genre_id INT,
+	PRIMARY KEY (id),
+	FOREIGN KEY (genre_id)
+		REFERENCES Genre (id)
+}
+
+/* Define table for storing artists */
+CREATE TABLE Artist (
+	id INT AUTO_INCREMENT,
+	first_name VARCHAR(25) NOT NULL,
+	last_name VARCHAR(25),
+	act_id INT NOT NULL,
+	PRIMARY KEY (id),
+	FOREIGN KEY (act_id)
+		REFERENCES Act (id) 
+);
+
+/* Define table for storing albums */
+CREATE TABLE Album (
+	id INT AUTO_INCREMENT,
+	name VARCHAR(50) NOT NULL,
+	year YEAR(4),
+	compilation BOOLEAN NOT NULL DEFAULT 0
+	price DECIMAL(5, 2) unsigned NOT NULL,
+}
+
+
+/* Define table for storing single tracks */
+CREATE TABLE Track (
+	id INT AUTO_INCREMENT,
+	title VARCHAR(50) NOT NULL,
+	act_id INT NOT NULL,
+	album_id INT NOT NULL,
+	PRIMARY KEY (id),
+	FOREIGN KEY (act_id)
+		REFERENCES Act (id),
+	FOREIGN KEY (album_id)
+		REFERENCES Album (id)
+);
+
+/* Define table for storing customers */
+CREATE TABLE Customer (
+	id INT AUTO_INCREMENT,
+	username VARCHAR(25) UNIQUE NOT NULL,
+	email_address VARCHAR(50) UNIQUE NOT NULL,
+	password VARCHAR(64),
+	first_name VARCHAR(50) NOT NULL,
+	last_name VARCHAR(50) NOT NULL,
+	address_1 VARCHAR(50) NOT NULL,
+	address_2 VARCHAR(50),
+	postcode VARCHAR(10) NOT NULL,
+	PRIMARY KEY (id)
+);
+
+/* Define table for storing orders */
+CREATE TABLE Order (
+	id INT AUTO_INCREMENT,
+	customer_id INT NOT NULL,
+	delivery ENUM('first class','second class','next working day'),
+	PRIMARY KEY (id),
+	FOREIGN KEY (customer_id)
+		REFERENCES Customer(id)
+);
+
+/* Define table for storing orderlines */
+CREATE TABLE OrderLine (
+	id INT AUTO_INCREMENT,
+	order_id INT NOT NULL,
+	album_id INT NOT NULL,
+	quantity INT NOT NULL,
+	PRIMARY KEY (id),
+	FOREIGN KEY (order_id)
+		REFERENCES Order(id),
+	FOREIGN KEY (album_id)
+		REFERENCES Album(id),
+);