title: A way to extract from a DateTime value data without seconds
body: <p>I have an sql <code>DateTime</code> (ms sql server) and want to extract the same date without the seconds:
  e.g. <code>2011-11-22 12:14:58.000</code> to become: <code>2011-11-22 12:14:00.000</code></p>
  
  <p>How can I do this? I was thinking to use <code>DATEADD</code> in combination with <code>DATEPART</code> but seems very error prone (besides performance issues)</p>