Update 27_online_shop.sql

[Abhirxm18]

SELECT * FROM orders LIMIT 5;
SELECT * FROM products LIMIT 5;
SELECT * FROM customers LIMIT 5;
SELECT o.*, p.name AS product_name, c.name AS customer_name
FROM orders o
JOIN products p ON o.item_id = p.id
JOIN customers c ON o.customer_id = c.id