Consider the HR Management database schema with the following relations :
1. Employees (employee\_id , name, joining\_year , department\_id )
2. Departments ( department\_id, department\_name )
3. Salaries ( salary\_id , employee\_id , salary\_amount , from\_date , to\_date )
4. Managers : ( manager\_id , employee\_id )
Note : manager\_id is subset of employee\_id.
(a) Write at least two relational algebraic expressions to find the employees details (employee\_id , name)
who work in either of the departments with id (department\_id) 101 or 102. ?
user