Products Never Sold

Return the names of products that do not appear in any sale.

Table schema

Products(id INT PRIMARY KEY, name VARCHAR(50))
Sales(id INT PRIMARY KEY, product_id INT, quantity INT)

Sample data

Products:
id | name
1 | Pen
2 | Book
3 | Bag

Sales:
id | product_id | quantity
1 | 1 | 10
2 | 3 | 2