d</td>
</th>
<tr>
  <td>1</td>
  <td>a</td>
</tr>
<tr>
  <td>2</td>
  <td>b</td>
</tr>
<tr>
  <td>3</td>
  <td>a</td>
</tr>
</tbody></table></center></p>
<li><span class="menu">Unique Rows...</span>:
This option creates a list of all <i>unique</i> rows, which are those rows that have no equal other row in table
considering the content of one or multiple defined columns. Considering the <i>kind</i> column
in the example above only row 2 is unique. Unique rows are independent of the sort order.</li>
<li><span