text: INSERT INTO departments (name)
  VALUES ("Sales"),("Legal"),("Engineering");
  
  INSERT INTO roles (title, salary, department_id)
  VALUES ("Director of Sales",145000.00,1),("Enterprise Account Executive",115000.00,1),("Mid-Market Account Executive",95000.00,1),
  ("General Council",150000.00,2),
  ("Senior Engineer",125000.00,3),("Junior Engineer",90000.00,3);
  
  INSERT INTO employees (firstName, lastName, role_id, manager_id)
  VALUES ("John","Smith",1,null),("Roderick","Bailey",2,1),("Rhonda", "Hart",3,1),
  ("Inez","West",4,null),
  ("Melody","McDaniel",5,null),("Bruce","Marshall",6,5);