text: -- 1. List the following details of each employee: employee number, last name, first name, sex, and salary.
  
  -- 2. List first name, last name, and hire date for employees who were hired in 1986.
  
  -- 3. List the manager of each department with the following information: department number, department name, the manager's employee number, last name, first name.
  
  -- 4. List the department of each employee with the following information: employee number, last name, first name, and department name.
  
  -- 5. List first name, last name, and sex for employees whose first name is "Hercules" and last names begin with "B."
  
  -- 6. List all employees in the Sales department, including their employee number, last name, first name, and department name.
  
  -- 7. List all employees in the Sales and Development departments, including their employee number, last name, first name, and department name.
  
  -- 8. In descending order, list the frequency count of employee last names, i.e., how many employees share each last name.
  