Question: 07. Express the following SQL query as a relational algebra expression. (20) SELECT SS, Name, Dept FROM Employee WHERE NOT EXISTS (SELECT FROM Employee2 WHERE

07. Express the following SQL query as a relational algebra expression. (20) SELECT SS, Name, Dept FROM Employee WHERE NOT EXISTS (SELECT FROM Employee2 WHERE Employee2.SS Employee.SS AND Employee2.Name Employee.Name AND Employee2.Salary Employee.Salary AND Employee2.Dept Employee.Dept)

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