title: Ensure endDate equal to or later than startDate
body: <p>I have a table in which I need to ensure that <code>startDate</code> is not later than <code>endDate</code>.</p>
  
  <p>Either date can be updated so the rules have to apply regardless if <code>startDate</code> or <code>endDate</code> (or both) are entered/modified.</p>
  
  <p>Is it better to use triggers, stored procedures or something else? Any sample syntax is appreciated.</p>