text: USE batman_db;
  INSERT INTO departments (department_name)
  VALUES
      ("Customer Service"),
      ("Human Resources"),
      ("Management");
  
  
  
  
  INSERT INTO roles (title, salary, department_id)
  VALUES
      ( "Team Lead", 15.25, 2),
      (  "Associate", 7.25, 1),
      (  "Manager", 30.25, 3);
  
  
  
  INSERT INTO employees (first_name, last_name, role_id)
  VALUES
      ( "Christopher","Kennard", 3),
      ( "Kaylee", "Kennard", 1),
      ( "Adonis", "Bailey", 2);
  
  UPDATE employees
  SET manager_id = 1
  WHERE id IN (2,3)