title: Can not group some of the selected columns
body: <p>I'm trying to pull up the selected columns for each UserID the last Date <code>DT</code> he made a purchase.</p>
  
  <p>So I think this is wrong because I can't group by <code>Purchased, A , S</code></p>
  
  <pre><code>SELECT UserID, MAX(Date), Purchased, A , S
  FROM aramdb
  WHERE Purchased &gt; 0 
  GROUP BY UserID;
  </code></pre>
  
  <p>Thanks!</p>