title: Getting total count and conditional count in a single query
body: <p>I have a table called apps in MYSQL database.</p>
  
  <pre>
  id  source 
  1    fb
  2    gd
  3    tw
  4    fb
  5    qu
  6    fb
  </pre>
  
  <p>I want a single query that will give me total count along with <code>fb</code> count</p>
  
  <pre>
  totalcount  source
  6            3
  </pre>