title: Tableau Desktop: Count Distinct returns higher value than Count (if connected to Google Big Query)
body: <p>I have a table with 2157 records, let's say with 3 columns (A,B,C) and I know that in column A there are 2154 different values.</p>
  
  <p>Using Tableau Desktop (and its own fenctions) connected to BigQuery, I get these results:</p>
  
  <ul>
  <li>Count(A) --> 2157</li>
  <li>CountD(A) --> 2180 (more than Count!!!)</li>
  </ul>
  
  <p>If i run the same calculations using queries in Big Query console, I get:</p>
  
  <ul>
  <li>Count --> 2157</li>
  <li>CountD --> 2154 (right)</li>
  </ul>
  
  <p>How can this be possible?</p>
  
  <p>By the way, if use a CSV file of the same table and I use it as datasource using Tableau Public (no Desktop), I get correct results as in Big Query.</p>
  
  <p>Thanks in advance</p>