3. Retrieve the different e_name from Employee

using descending order on Salary.

4.Drop Salary attribute from Employee.

6. Retrieve all d_no from the " Employee " and the "Department?

7. Retrieve d_no that can be found in " Employee " and "Department?

Exercise 1. 2. Create a data base (company_Student number). You need to use your student number when naming the database Create two tables in the database: Employee. employee_no e_name Salary phone d_no 1456 Ahmad 1457 Khaled 1458 Ahmad 1459 Mohamed Department d_no 1 4000 4500 3000 6000 0555558888 0555553333 0555554444 0555555777 1 2 3 4 d_name 1 CS 2 3 4 5 IS SE CS CS manager_no 1457 1459 1444 1433 1411 Note: d_no in Department is primary key. 69