title: Laravel Combine DB Queries
body: <p>Is it possible to combine the following two queries into one?</p>
  
  <pre><code>$session_id = DB::table('oauth_access_tokens')-&gt;where('id', '=', $access_token)-&gt;value('session_id');
  $owner_id = DB::table('oauth_sessions')-&gt;where('id', '=', $session_id)-&gt;value('owner_id');
  </code></pre>
  
  <p>Thanks for your help!</p>