title: Calculate sum of two columns in order by clause - laravel
body: <p>I'm trying to convert the below mysql query into laravel equivalent.</p>
  
  <pre><code>select email from emails 
  order by call_count + receive_count desc;
  </code></pre>
  
  <p>to Laravel</p>
  
  <pre><code>DB::table('emails')
  -&gt;select('email')
  -&gt;orderBy(SUM('call_count','receive_count'), 'DESC')
  -&gt;get();
  </code></pre>
  
  <p>Please let me know.. Thanks</p>