Can you list all the product type codes that have two or more products?
select product_type_code from products group by product_type_code having count ( * ) > = 2
What is the name of the product with the greatest price?
select product_name from products order by product_price desc limit 1
What are the names of all products with prices over 3000?
select product_name from products where product_price > 3000