Given the same simple Employee-Workson-Project database schema ,
which contains three files described as follows:Emp (eid : integer, ename : string, age : integer, salary:
real)Workson (eid : integer, pid : integer, hours : integer)Project (pid : integer, pname : string, budget : real, managerid
: integer)Note : eid, ename, age and salary are the employee id,
name, age and salary respectively. Also, hours is the number of
hours worked by employee on a project. The rest of the attributes...