saction, acquiring a write lock.
                        Transactions begun this way will be written to the disk
                        upon commit. No other lock can co-exist with an
                        exclusive lock.
                    </p>
            </li>
          </ul>
        </div>
        <p>
                The last two statements are a kind of a contract. If you can
                get them to complete (that is, not return
                <code class="literal">SQLITE_LOCKED</code>), then 