80 lines
2.3 KiB
SQL
80 lines
2.3 KiB
SQL
-- USER TABLE
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CREATE TABLE users (
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id SERIAL PRIMARY KEY,
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username VARCHAR(50) UNIQUE NOT NULL,
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password VARCHAR(255) NOT NULL,
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email VARCHAR(100)
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);
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-- MENU ITEM TABLE
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CREATE TABLE menu_items (
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id SERIAL PRIMARY KEY,
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name VARCHAR(100) NOT NULL,
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description TEXT,
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price DECIMAL(10,2) NOT NULL CHECK (price > 0),
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category VARCHAR(50)
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);
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-- ORDER TABLE
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CREATE TABLE orders (
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id SERIAL PRIMARY KEY,
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user_id INT NOT NULL,
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created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
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total_price DECIMAL(10, 2) NOT NULL DEFAULT 0.00,
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CONSTRAINT fk_user_order FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
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);
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-- ORDER DETAIL TABLE
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CREATE TABLE order_details (
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id SERIAL PRIMARY KEY,
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order_id INT NOT NULL,
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menu_item_id INT NOT NULL,
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quantity INT NOT NULL CHECK (quantity>0),
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price_at_purchase DECIMAL(10,2) NOT NULL,
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CONSTRAINT fk_detail_order FOREIGN KEY (order_id) REFERENCES orders(id) ON DELETE CASCADE,
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CONSTRAINT fk_detail_menu FOREIGN KEY (menu_item_id) REFERENCES menu_items(id)
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)
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-- INITIAL MENU DATA
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INSERT INTO menu_items (name, description, price, category) VALUES
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('Cheeseburger', 'Juicy beef patty with cheddar cheese', 8.99, 'Food'),
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('Pepperoni Pizza', 'Classic pizza with pepperoni and mozzarella', 12.50, 'Food'),
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('Iced Latte', 'Espresso with cold milk and ice', 4.25, 'Drink');
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-- OPTIONAL TEST DATA
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INSERT INTO users (username, password, email) VALUES
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('mardin_dev', 'hashed_pass_123', 'mardin@example.com'),
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('sara_kh', 'hashed_pass_456', 'sara@example.com');
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INSERT INTO orders (user_id, total_price) VALUES
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(1, 21.49),
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(2, 4.25);
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INSERT INTO order_details (order_id, menu_item_id, quantity, price_at_purchase) VALUES
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(1, 1, 1, 8.99),
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(1, 2, 1, 12.50);
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INSERT INTO order_details (order_id, menu_item_id, quantity, price_at_purchase) VALUES
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(2, 3, 1, 4.25);
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-- VERIFICATION QUERIES
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SELECT * FROM users;
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SELECT * FROM menu_items;
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SELECT * FROM orders;
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SELECT * FROM order_details;
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SELECT
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o.id AS order_number,
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u.username AS customer,
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m.name AS food_item,
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od.quantity,
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od.price_at_purchase,
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(od.quantity * od.price_at_purchase) AS subtotal,
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o.created_at
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FROM orders o
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JOIN users u ON o.user_id = u.id
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JOIN order_details od ON od.order_id = o.id
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JOIN menu_items m ON od.menu_item_id = m.id; |