text: INSERT INTO departments (title)
  VALUES
      ('Managment'),
      ('HR'),
      ('Sales'),
      ('Web Development'),
      ('Legal');
  
  INSERT INTO roles (title, salary, department_id)
  VALUES
      ('Managment', 68000, 1 ),
      ('HR', 55000, 2),
      ('Sales', 75000, 3 ),
      ('Web Developer', 88000, 4),
      ('Lawyer', 150000, 5);    
  
  INSERT INTO employees (first_name, last_name, role_id, manager_id)
  VALUES
      ('Aileen', 'Wuornos', 1, NULL),
      ('Myra', 'Hindley', 2, NULL),
      ('Ted', 'Bundy', 3, 1),
      ('Joel', 'Rifkin', 4, 1),
      ('Andrei', 'Chikatilo', 5, 2),
      ('Charles', 'Cullen', 2, 2),
      ('Pedro', 'Rodrigues-Filho', 4, 2);
  
  
  
  