Derived Tables
1. Derived Tables are nothing but using a result of a query as a table. 2. This is much better than using temporary tables. 3. This increases the performance. 4. The below shows how to return employee and department info for those who don’t belong to a inactive department Select EmployeeID, FirstName, LastName, Dt.DeptName from Employee INNER JOIN (Select * from Dept where Status !='InActive') Dt ON Dt.DeptID = Employee.DeptID