title: Not a group by expression : error
body: <p>I want to query on a table keeping few fields as disctict. So, I use group by on the fields to be distinct. BUt HANA system throws an error: Not A Group By expression    </p>
  
  <pre><code>select "REFID", "ORGID_WE", "ARTIKLE", "ORGID", "HELLER", "WERT", "BZBAS_AW" 
  from "SYSTEM"."SOFT"
  GROUP BY "REFID", "ORGID_WE", "ARTIKLE", "ORGID", "HELLER" ;
  </code></pre>
  
  <p>For me this looks good. Any ideas??</p>