• A store maintains data on customers, products and purchase records in three tables: CUSTOMER, PRODUCT, PURCHASE. The store manager wants to know which product is on its maximum discount for each category.Write a query to print the following fields for each category, ordered by productID ascending : category, product_id and discount for the product that has the max discount in category. In the case of multiple products having same max discount within a category, print the product with minimum product_id