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Consider the following database and its schema and write relational algebra expression to retrieve: - ID and name of each employee who does not work

Consider the following database and its schema and write relational algebra expression to retrieve:

- ID and name of each employee who does not work for BigBank.

Employee Database

Employee(E_ID, E_Name, E_City)

Works (E_ID, Company_Name, Salary)

Company (Company_Name, City)

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