Given the relations
employee (name, salary, deptno) and
department (deptno, deptname, address)
Which of the following queries cannot be expressed using the basic relational algebra operations (U, -, x, π, σ, p)?
1
Department address of every employee
2
Employees whose name is the same as their department name
3
The sum of all employees' salaries
4
All employees of a given department
5
Question Not Attempted