title: SQL Select Subtract Date Time with Date Time
body: <p>I have 2 different fields from a table and both have same format of timestamp.</p>
  
  <p><code>7/18/2012 10:19:48 AM</code> 
  <br> and <br>
  <code>7/18/2012 10:20:46 AM</code></p>
  
  <p>How can I subtract two timestamp to get the duration in time.</p>