title: How to write the following query in orm using kohana
body: <blockquote>
    <p>select * from u_question uq,users u 
    where uq.asked_by=u.id and  asked_by
    in (select u.id from fb_relations
    f,users u where f.user1='515683059'
    and u.fb_uid=f.user2) group by
    asked_by</p>
  </blockquote>