54 lines
1.3 KiB
SQL
54 lines
1.3 KiB
SQL
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CREATE TABLE users(
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id SERIAL PRIMARY KEY,
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username VARCHAR(50) NOT NULL UNIQUE,
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password VARCHAR(100) 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 INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
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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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CREATE TABLE order_details (
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id SERIAL PRIMARY KEY,
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order_id INTEGER NOT NULL REFERENCES orders(id) ON DELETE CASCADE,
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menu_item_id INTEGER NOT NULL REFERENCES menu_items(id),
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quantity INTEGER NOT NULL CHECK (quantity > 0),
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price NUMERIC(10, 2) NOT NULL CHECK (price > 0)
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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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('Pizza', 'Cheese pizza with tomato sauce', 12.50, 'Pizza'),
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('Burger', 'Beef burger with fries', 9.00, 'Burger'),
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('Pasta', 'Pasta with Alfredo sauce', 11.00, 'Pasta'),
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('Cola', 'Cold soft drink', 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;
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