title: Qlikview aggration with conditions
body: <p>I have some data like below -</p>
  
  <pre><code>id, fn, ln, logdate
  1, Rob, Hep, 01-04-2010
  2, Rob, Hep, 09-04-2010
  3, Rob, Hep, 10-10-2012
  4, Rob, Hep, 01-12-2009
  5, Peter, Cheng, 02-10-2010
  6, bob, Pen, 05-10-2009
  7, Peter, Cheng, 01-10-2009
  8, Kim, Rany, 08-01-2010
  </code></pre>
  
  <p>I will have to write an expression  </p>
  
  <ol>
  <li>Group the above data by fn+ln.</li>
  <li>From the Group get the record of min(logdate)</li>
  <li>For each min logdate from above, find count if the date is above '01-01-2010'</li>
  </ol>
  
  <p>So in this example - </p>
  
  <blockquote>
    <p>I should get count as one. (Rob Hep's min log date is 01-12-2009 and Peter Cheng's 01-10-2009 and bob Pen's is alos 05-10-2009 all of them are before 01-01-2009)</p>
  </blockquote>
  
  <p>Can some one help me in writing the expression for it please?</p>