CREATE TABLE products (product_name VARCHAR, product_type_code VARCHAR, product_price VARCHAR)

Find the name of the most expensive hardware product.
SELECT product_name FROM products WHERE product_type_code = 'Hardware' ORDER BY product_price DESC LIMIT 1
SELECT "product_name" FROM "products" WHERE "product_type_code" = 'Hardware' ORDER BY "product_price" DESC NULLS LAST LIMIT 1