forked from AdvancedProgramming1404/WS-10-Database
adding codes
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-- Restaurant Database Management System
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--
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-- Instructions:
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-- 1. Create all required tables.
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-- 2. Design appropriate PRIMARY KEY and FOREIGN KEY relationships.
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-- 3. Add suitable constraints based on the requirements.
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-- 4. Insert initial mock data.
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-- 5. Insert at least 3 menu items.
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-- 6. The script should be executable from start to finish without errors.
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-- =========================================================
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-- WS 10 - Restaurant Database Management System
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-- database.sql
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-- =========================================================
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-- Drop tables if they already exist (useful when re-running the script)
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DROP TABLE IF EXISTS order_details;
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DROP TABLE IF EXISTS orders;
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DROP TABLE IF EXISTS menu_items;
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DROP TABLE IF EXISTS users;
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-- =======================================================
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-- USER TABLE
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-- =======================================================
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--
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-- Represents customers using the system.
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--
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-- Required information:
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-- - Unique identifier
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-- - Username
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-- - Password
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-- - Email (optional)
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--
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-- Requirements:
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-- - Each user must have a unique identifier.
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-- - Usernames must be unique.
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-- - Username and password are required.
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-- - Passwords should not be stored in plain text.
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--
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-- CREATE TABLE ...
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-- =========================================================
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-- 1. USERS (Customer)
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-- =========================================================
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CREATE TABLE users (
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id BIGSERIAL NOT NULL PRIMARY KEY,
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username VARCHAR(50) NOT NULL UNIQUE,
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password_hash VARCHAR(255) NOT NULL,
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email VARCHAR(100)
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);
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-- =========================================================
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-- 2. MENU_ITEMS
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-- =========================================================
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CREATE TABLE menu_items (
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id BIGSERIAL NOT NULL PRIMARY KEY,
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name VARCHAR(100) NOT NULL,
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description VARCHAR(255),
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price NUMERIC(10, 2) NOT NULL CHECK (price > 0),
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category VARCHAR(50)
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);
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-- =========================================================
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-- 3. ORDERS
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-- =========================================================
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CREATE TABLE orders (
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id BIGSERIAL NOT NULL PRIMARY KEY,
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user_id BIGINT NOT NULL REFERENCES users (id),
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created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
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total_price NUMERIC(10, 2) NOT NULL CHECK (total_price >= 0)
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);
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-- =======================================================
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-- MENU ITEM TABLE
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-- =======================================================
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--
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-- Represents available food and drink items.
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--
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-- Required information:
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-- - Unique identifier
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-- - Name
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-- - Description (optional)
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-- - Price
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-- - Category (optional)
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--
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-- Requirements:
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-- - Each menu item must have a unique identifier.
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-- - Name is required.
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-- - Price must always be positive.
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--
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-- CREATE TABLE ...
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-- =========================================================
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-- 4. ORDER_DETAILS (items inside an order)
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-- =========================================================
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CREATE TABLE order_details (
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id BIGSERIAL NOT NULL PRIMARY KEY,
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order_id BIGINT NOT NULL REFERENCES orders (id),
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menu_item_id BIGINT NOT NULL REFERENCES menu_items (id),
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quantity INT NOT NULL CHECK (quantity > 0),
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unit_price NUMERIC(10, 2) NOT NULL CHECK (unit_price > 0)
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);
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-- =========================================================
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-- Initial mock data
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-- =========================================================
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-- Sample users
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-- NOTE: these password_hash values are just placeholders.
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-- Your Java app must hash real passwords before inserting (e.g. with BCrypt).
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INSERT INTO users (username, password_hash, email) VALUES
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('john_doe', '$2a$10$placeholderHashValue1234567890', 'john@example.com'),
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('jane_smith', '$2a$10$placeholderHashValue1234567891', 'jane@example.com');
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-- =======================================================
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-- ORDER TABLE
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-- =======================================================
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--
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-- Represents orders placed by customers.
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--
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-- Required information:
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-- - Unique identifier
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-- - Reference to customer
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-- - Creation date and time
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-- - Total price
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--
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-- Requirements:
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-- - Each order must belong to exactly one user.
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-- - A user can have multiple orders.
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-- - The relationship between User and Order must be implemented.
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--
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-- Note:
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-- Avoid using reserved SQL keywords as table names.
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-- Consider using a name such as "orders" or "customer_orders".
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--
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-- CREATE TABLE ...
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-- Sample menu items (at least 3 required)
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INSERT INTO menu_items (name, description, price, category) VALUES
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('Pizza Margherita', 'Classic pizza with tomato, mozzarella and basil', 10.00, 'Main'),
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('Cheeseburger', 'Beef patty with cheddar cheese and house sauce', 8.00, 'Main'),
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('Pasta Carbonara', 'Pasta with egg, pancetta and parmesan', 12.00, 'Main'),
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('Tiramisu', 'Traditional Italian coffee-flavored dessert', 6.50, 'Dessert'),
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('Cola', 'Soft drink, 330ml can', 2.50, 'Drink');-- =========================================================
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-- WS 10 - Restaurant Database Management System
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-- database.sql
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-- =========================================================
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-- Drop tables if they already exist (useful when re-running the script)
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DROP TABLE IF EXISTS order_details;
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DROP TABLE IF EXISTS orders;
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DROP TABLE IF EXISTS menu_items;
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DROP TABLE IF EXISTS users;
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-- =========================================================
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-- 1. USERS (Customer)
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-- =========================================================
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CREATE TABLE users (
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id BIGSERIAL NOT NULL PRIMARY KEY,
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username VARCHAR(50) NOT NULL UNIQUE,
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password_hash VARCHAR(255) NOT NULL,
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email VARCHAR(100)
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);
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-- =======================================================
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-- ORDER DETAIL TABLE
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-- =======================================================
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--
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-- Represents items inside an order.
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--
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-- Required information:
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-- - Unique identifier
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-- - Reference to an order
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-- - Reference to a menu item
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-- - Quantity
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-- - Item price at purchase time
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--
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-- Requirements:
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-- - Each detail record must belong to one order.
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-- - Each detail record must reference one menu item.
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-- - Quantity must always be greater than zero.
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-- - Store the item's price at the moment of purchase.
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--
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-- CREATE TABLE ...
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-- =========================================================
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-- 2. MENU_ITEMS
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-- =========================================================
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CREATE TABLE menu_items (
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id BIGSERIAL NOT NULL PRIMARY KEY,
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name VARCHAR(100) NOT NULL,
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description VARCHAR(255),
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price NUMERIC(10, 2) NOT NULL CHECK (price > 0),
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category VARCHAR(50)
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);
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-- =========================================================
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-- 3. ORDERS
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-- =========================================================
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CREATE TABLE orders (
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id BIGSERIAL NOT NULL PRIMARY KEY,
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user_id BIGINT NOT NULL REFERENCES users (id),
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created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
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total_price NUMERIC(10, 2) NOT NULL CHECK (total_price >= 0)
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);
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-- =========================================================
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-- 4. ORDER_DETAILS (items inside an order)
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-- =========================================================
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CREATE TABLE order_details (
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id BIGSERIAL NOT NULL PRIMARY KEY,
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order_id BIGINT NOT NULL REFERENCES orders (id),
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menu_item_id BIGINT NOT NULL REFERENCES menu_items (id),
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quantity INT NOT NULL CHECK (quantity > 0),
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unit_price NUMERIC(10, 2) NOT NULL CHECK (unit_price > 0)
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);
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-- =======================================================
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-- INITIAL MENU DATA
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-- =======================================================
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--
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-- Insert at least 3 food or drink items.
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--
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-- Example categories:
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-- - Pizza
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-- - Burger
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-- - Pasta
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-- - Drink
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--
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-- INSERT INTO ...
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-- =========================================================
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-- Initial mock data
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-- =========================================================
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-- Sample users
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-- NOTE: these password_hash values are just placeholders.
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-- Your Java app must hash real passwords before inserting (e.g. with BCrypt).
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INSERT INTO users (username, password_hash, email) VALUES
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('john_doe', '$2a$10$placeholderHashValue1234567890', 'john@example.com'),
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('jane_smith', '$2a$10$placeholderHashValue1234567891', 'jane@example.com');
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-- =======================================================
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-- OPTIONAL TEST DATA
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-- =======================================================
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--
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-- You may insert sample users and orders for testing.
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-- This section is optional.
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--
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-- INSERT INTO ...
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-- =======================================================
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-- VERIFICATION QUERIES
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-- =======================================================
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--
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-- Uncomment these queries to verify your database.
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--
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-- SELECT * FROM ...;
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-- SELECT * FROM ...;
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-- SELECT * FROM ...;
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-- SELECT * FROM ...;
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-- Sample menu items (at least 3 required)
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INSERT INTO menu_items (name, description, price, category) VALUES
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('Pizza Margherita', 'Classic pizza with tomato, mozzarella and basil', 10.00, 'Main'),
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('Cheeseburger', 'Beef patty with cheddar cheese and house sauce', 8.00, 'Main'),
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('Pasta Carbonara', 'Pasta with egg, pancetta and parmesan', 12.00, 'Main'),
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('Tiramisu', 'Traditional Italian coffee-flavored dessert', 6.50, 'Dessert'),
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('Cola', 'Soft drink, 330ml can', 2.50, 'Drink');
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