Write a query that Balance of each CUSTOMER who have made purchase(s) before AND subtotal that each customer purchased. So that we can find the ENDING balance.  Output: CUS_CODE SUBTOTAL CUS_BALANCE ENDING_BALANCE 10010 0 0 0 10011 444.15 0 444.15 10012 154 346 500 10013 0 537 537 10014 422.87 0 422.87 10015 34.99 0 34.99 10016 0 221 221 10017 0 769 769 10018 70.44 217 287.44 10019 0 0 0

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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.