title: RDLC report with column group
body: <p><a href="https://i.stack.imgur.com/uHwVs.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/uHwVs.jpg" alt="Screenshot"></a></p>
  
  <p>I have this code in column <code>[PSAResPerf_CategoryName]</code>.</p>
  
  <pre><code>=Fields!PSAResPerf_CategoryName.Value / Sum(Fields!PSAResPerf_CategoryName.Value) * 100
  </code></pre>
  
  <p>column <code>[PSAResPerf_CategoryName]</code> is a column group. </p>
  
  <p>for example:</p>
  
  <p>we have 4 columns, value are: </p>
  
  <ul>
  <li>column A: 10</li>
  <li>column B: 5</li>
  <li>column C: 5</li>
  <li>column D: 2 </li>
  </ul>
  
  <p>In <code>column A</code> I want: ( 10 / 22 ) * 100, but the sum in the column group takes the sum of the same value, so Its always 100%. </p>
  
  <p>Is there a way to get the sum of all the columns before I see them all? </p>