1. Write a query to display the last name, department number, and department name for
   all employees. 

2. Create a unique listing of all jobs that are in department 80. Include the location of the 
   department in the output.

3. Write a query to display the employee last name, department name, location ID, and city of 
   all employees who earn a commission.

4. Display the employee last name and department name for all employees who have an a
   (lowercase) in their last names.

5. Write a query to display the last name, job, department number, and department name for all
   employees who work in Toronto.

6. Display the employee last name and employee number along with their manager’s last name 
   and manager number. Label the columns Employee, Emp#, Manager, and Mgr#, 
   respectively.

7. Display all employees including King, who has no manager. Order the results by the employee number.

8. Create a query that displays employee last names, department numbers, and all the
   employees who work in the same department as a given employee. Give each column an 
   appropriate label.

9. Show the structure of the JOB_GRADES table. Create a query that displays the name, job,
   department name, salary, and grade for all employees. 

10. Create a query to display the name and hire date of any employee hired after employee Davies.

11. Display the names and hire dates for all employees who were hired before their managers, 
    along with their manager’s names and hire dates. Label the columns Employee, Emp
    Hired, Manager, and Mgr Hired, respectively.