cursors that are participating in your join query. 
                    <span>Note that this array must be null terminated.</span>

                </p>
            </li>
            <li>
              <p>

                    Obtain a join cursor. You do this using the 
                         
                        <code class="methodname">DB-&gt;join()</code> 
                         
                    method.  You must pass this method the array of secondary cursors that you
                    op