93 lines
2.7 KiB
SQL
93 lines
2.7 KiB
SQL
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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-- =======================================================
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-- USER TABLE
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-- =======================================================
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CREATE TABLE users (
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id BIGSERIAL 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) UNIQUE
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);
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-- =======================================================
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-- MENU ITEM TABLE
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-- =======================================================
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CREATE TABLE menu_items (
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id BIGSERIAL 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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-- =======================================================
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-- ORDERS TABLE
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-- =======================================================
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CREATE TABLE orders (
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id BIGSERIAL PRIMARY KEY,
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user_id BIGINT NOT NULL,
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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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CONSTRAINT fk_orders_user
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FOREIGN KEY (user_id)
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REFERENCES users(id)
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ON DELETE CASCADE
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);
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-- =======================================================
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-- ORDER DETAILS TABLE
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-- =======================================================
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CREATE TABLE order_details (
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id BIGSERIAL PRIMARY KEY,
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order_id BIGINT NOT NULL,
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menu_item_id BIGINT NOT NULL,
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quantity INTEGER NOT NULL CHECK (quantity > 0),
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item_price NUMERIC(10,2) NOT NULL CHECK (item_price > 0),
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CONSTRAINT fk_order_details_order
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FOREIGN KEY (order_id)
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REFERENCES orders(id)
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ON DELETE CASCADE,
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CONSTRAINT fk_order_details_menu_item
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FOREIGN KEY (menu_item_id)
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REFERENCES menu_items(id)
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);
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-- =======================================================
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-- INITIAL MENU DATA
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-- =======================================================
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INSERT INTO menu_items (name, description, price, category)
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VALUES
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('Pepperoni Pizza', 'Classic pepperoni pizza', 10.99, 'Pizza'),
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('Cheese Burger', 'Beef burger with cheese', 8.50, 'Burger'),
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('Chicken Pasta', 'Creamy chicken pasta', 12.75, 'Pasta'),
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('Coca Cola', 'Soft drink', 2.50, 'Drink');
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-- =======================================================
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-- OPTIONAL TEST DATA
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-- =======================================================
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INSERT INTO users (username, password_hash, email)
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VALUES
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('ali', 'hashed_password_1', 'ali@example.com'),
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('sara', 'hashed_password_2', 'sara@example.com');
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INSERT INTO orders (user_id, total_price)
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VALUES
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(1, 24.48);
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INSERT INTO order_details (order_id, menu_item_id, quantity, item_price)
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VALUES
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(1, 1, 2, 10.99),
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(1, 4, 1, 2.50); |