title: count distinct records (all columns) not working
body: <p>what's proper syntax for </p>
  
  <pre><code>count (distinct *) from t1
  </code></pre>
  
  <p>I am getting he following error:</p>
  
  <blockquote>
    <p>[Err] 42000 - [SQL Server]Incorrect syntax near the keyword 'distinct'.</p>
  </blockquote>