title: Select Fields, count() group by on eloquent laravel
body: <p>How do a query like:</p>
  
  <p><code>SELECT agenda_id, data, count(*) FROM marcacoes group by data, agenda_id</code></p>
  
  <p>I try <code>$agendas = Marcacao::select(['data', 'agenda_id'])-&gt;groupBy('data', 'agenda_id')-&gt;count();</code> but the result is only the field <code>count</code>. The fields <code>data</code> and <code>agenda_id</code> is not showing.</p>