CREATE TABLE menu_items (
    id INT AUTO_INCREMENT PRIMARY KEY,
    name VARCHAR(100) NOT NULL,
    description TEXT,
    price DECIMAL(10,2) NOT NULL,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

-- Invoices table
CREATE TABLE invoices (
    id INT AUTO_INCREMENT PRIMARY KEY,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

-- Invoice items table
CREATE TABLE invoice_items (
    id INT AUTO_INCREMENT PRIMARY KEY,
    invoice_id INT NOT NULL,
    menu_item_id INT NOT NULL,
    quantity INT NOT NULL,
    FOREIGN KEY (invoice_id) REFERENCES invoices(id) ON DELETE CASCADE
);