What are the maximum and minimum product prices for each product type?
SELECT product_type_code ,  max(product_price) ,  min(product_price) FROM products GROUP BY product_type_code
SELECT product_type_code ,  max(product_price) ,  min(product_price) FROM products GROUP BY product_type_code
[{'product_type_code': 'Clothes', 'max(product_price)': 939.57, 'min(product_price)': 408.82}, {'product_type_code': 'Hardware', 'max(product_price)': 971.44, 'min(product_price)': 612.46}]