1. List the library members who are expected to return their books that are due on -30-Apr-2021'. 2. List library members who have not borrowed any books yet in 2021. Show only the borrowerNo. 3. For copies of books that are available ('Y' for available), show their ISBN and number of copies. 4. Sort them according to descending order of number of copies. Give any new column an alias.

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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.