title: Django ORM INNER JOIN
body: <p>I have not been able to do this query with Django ORM. 
  how to make a inner join, how to do this query and return only the columns I want? </p>
  
  <pre><code>SELECT     establecimiento.nombre, categoria.titulo
  FROM         establecimiento INNER JOIN
                        categoria ON establecimiento.categoria = categoria.id
  </code></pre>