title: using DateDiff to find duration in minutes
body: <p>I am trying to use <code>Datediff</code> to find out the duration between <code>columnA</code> and <code>columnB</code>. </p>
  
  <pre><code>SELECT datediff (minute, stime, etime)
  from Exceptions2
  where stime = [exceptions2].starttime
  and etime = [exceptions2].endtime
  </code></pre>
  
  <p>This produces errors. Can anyone please help me with what I'm doing wrong?</p>