text: INSERT INTO department (department_name)
  VALUES 
  ("Research & Development"),
  ("Engineering"),
  ("Sales"),
  ("Human Resources");
  
  INSERT INTO emp_role (title, salary, department_id)
  VALUES 
  ("Research Lead", 100000, 1),
  ("Head Mechanic", 300000, 2),
  ("Sales Rep", 25000, 3),
  ("The Karen", 10000, 4);
  
  INSERT INTO employee (first_name, last_name, role_id, manager_id)
  VALUES 
  ("Bob", "Costas", 1, 4),
  ("Tony", "Dungee", 2, 4),
  ("Mike", "McCarthy", 3, 4),
  ("Karen", "Karen", 4, null);
  