Using tuple relational calculus

Retrieve the names of all employees who have exactly one dependent.

EMPLOYEE Fname Minit Lname sn te AddressexSalarySuper n Dno DEPARTMENT Dname: Dnumber Mgr ssn Mor start date DEPT LOCATIONS DnumberDlocation PROJECT PamePnumber PlocationDnum WORKS ON Essn Pno Hours Figure 5.5 Schema diagram for t COMPANY relational database schema. DEPENDENT EssnDependent name SexBdate Relationship