Move unrelated information to another class

example-good-interface-2.php

<?php
// Coding Horror
interface Employee
{
  
  /* The abstraction of all these routines belove is at the Employee level */ 
  public function getEmployee($id);
  
  public function removeEmployee($id);
  
  public function updateEmployee($id, $data);
  
  /* The abstraction of all these routines belove is at Database level */
  public function getQueryToCreateEmployee($data);
  
  public function getQueryToModifyEmployee($id, $data);
  
  public function getQueryToRemoveEmployee($id);
  
}