title: Add & remove more column based searches/filters to datatables
body: <p>I want to add some button which create on click a search/filter for a datatable.</p>
  <pre><code>&lt;button class=&quot;seachbutton&quot; id=&quot;searchbutton_1&quot; data-column=&quot;0&quot; data-value=&quot;lookforthis_A&quot;&gt;
  &lt;button class=&quot;seachbutton&quot; id=&quot;searchbutton_2&quot; data-column=&quot;1&quot; data-value=&quot;lookforthis_B&quot;&gt;
  &lt;button class=&quot;seachbutton&quot; id=&quot;searchbutton_3&quot; data-column=&quot;2&quot; data-value=&quot;lookforthis_C&quot;&gt;
  </code></pre>
  <p>I add a column-bases search with this code from the datatables examples</p>
  <pre><code>var table = $('#example').DataTable();
   
  $('.searchbutton').on( 'click', function () {
      table
          .columns( $(this).attr(&quot;data-column&quot;) )
          .search( $(this).attr(&quot;data-value&quot;))
          .draw();
  } );
  </code></pre>
  <p>If I click on a button the filter/search for the clicked button works fine.</p>
  <p>Now if I click at a second button, this search should additional to the existing search (after first click on button1).</p>
  <p>For Example
  First click on a button - query: &quot;Column=0&amp;value=lookforthis_A&quot;</p>
  <p>Click at another button -query: &quot;Column=0&amp;value=lookforthis_A &amp; Column=1&amp;value=lookforthis_B&quot;</p>
  <p>How can I do this?</p>
  <p>Also I have to remove the searches/filters by click the button again - how can I do this too?</p>