what is wrong with this query:     Select Title,count(Rental_ID) as Rentals,(rental_rate*Count(rental_id)) As Revenue From Film join Inventory on Film.Film_ID = Inventory.Film_ID join rental Group By Title Order By Revenue Desc

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Single Table

In a database management system, a single table is designed to obtain data of heterogeneous items. A single-table design with DynamoDB resolves the issue of raising multiple requests for the relevant data of an entity.