forked from AdvancedProgramming1404/WS-10-Database
56 lines
1.7 KiB
SQL
56 lines
1.7 KiB
SQL
-- Restaurant Database Management System
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DROP TABLE IF EXISTS order_details CASCADE;
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DROP TABLE IF EXISTS orders CASCADE;
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DROP TABLE IF EXISTS menu_items CASCADE;
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DROP TABLE IF EXISTS users CASCADE;
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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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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 NUMERIC(10, 2) NOT NULL CHECK (price > 0),
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category VARCHAR(50)
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);
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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 NUMERIC(10, 2) NOT NULL DEFAULT 0.00,
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CONSTRAINT fk_orders_user FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
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);
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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 NUMERIC(10, 2) NOT NULL,
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CONSTRAINT fk_details_order FOREIGN KEY (order_id) REFERENCES orders(id) ON DELETE CASCADE,
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CONSTRAINT fk_details_menu_item FOREIGN KEY (menu_item_id) REFERENCES menu_items(id) ON DELETE CASCADE
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);
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INSERT INTO menu_items (name, description, price, category) VALUES
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('Pizza', 'Delicious cheese and tomato stone-baked pizza', 10.00, 'Pizza'),
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('Burger', 'Juicy beef patty with lettuce, tomato, and house sauce', 8.00, 'Burger'),
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('Pasta', 'Rich creamy Alfredo pasta with fresh herbs', 12.00, 'Pasta'),
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('Soda', 'Chilled refreshing carbonated beverage', 2.50, 'Drink');
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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; |