What indexes could you add to help a query that selects the count of catalog items each supplier supplies? What indexes could you add to help a query that selects the count of orders per customer? What indexes could you add to help a query that selects the count of the number of items in each customer order? What indexes could you add to help a query that selects the average number of item quantities in each customer orders? Could an index help a sub-query to select the difference between the average overall order item quantity and the average number of item quantities in each customer orders?
What indexes could you add to help a query that selects the count of catalog items each supplier supplies? What indexes could you add to help a query that selects the count of orders per customer? What indexes could you add to help a query that selects the count of the number of items in each customer order? What indexes could you add to help a query that selects the average number of item quantities in each customer orders? Could an index help a sub-query to select the difference between the average overall order item quantity and the average number of item quantities in each customer orders?
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