text: INSERT INTO department (name)
  VALUES
  ('Company'),
  ('Human Resources'),
  ('Marketing'),
  ('IT'),
  ('Logistics'),
  ('Sales'),
  ('Finance');
  
  INSERT INTO role (title,salary,department_id)
  VALUES
  ('CEO', 100000, 1),
  ('HR Manager', 80000, 2),
  ('Marketing Manager',70000,3),
  ('Sr. Software Developer', 120000, 4),
  ('Jr. Software Developer', 90000, 4),
  ('HR Specialist', 60000, 2),
  ('Accountant', 60000, 7),
  ('Finance Manager', 80000,7);
  
  INSERT INTO employee (first_name,last_name,role_id,manager_id)
  VALUES
  ('Meredith','Grey',1,NULL),
  ('Christina','Yang', 7, 1),
  ('Jo','Wilson',4,1),
  ('Derek','Shepherd',3,2),
  ('Izzie','Stevens',2,3),
  ('Alex', 'Karev',5,2);