title: How to get Avg Date in SQL Qry
body: <p>I am trying to get the Average Date in sql and am not sure how to do this.  I have the following fields:</p>
  
  <pre><code>ID   Date1             Date2                   Date3
  1    05/04/2012        08/09/2012             07/02/2012
  </code></pre>
  
  <p>i want to add another column that shows the Average Date for the ID number 1.  I have done only average number but never done average Date.  thanks</p>