query: SELECT product_type_code ,  max(product_price) ,  min(product_price) FROM products GROUP BY product_type_code
question: What are the maximum and minimum product prices for each product type?
query_toks: SELECT product_type_code , max ( product_price ) , min ( product_price ) FROM products GROUP BY product_type_code
query_toks_no_value: select product_type_code , max ( product_price ) , min ( product_price ) from products group by product_type_code
question_toks: What are the maximum and minimum product prices for each product type?