UP BY CUSTNO</p>
<p>No datasource needed, both querys will be executed only once to enhace performanc 
  and<br>
  net bandwith.</p>
<p>Now to show the correct grand total (TOTALS.AMOUNT) for each customer at the 
  group header:</p>
<p>INMEMTOTAL dataset with MyBase connection, UNION the TOTALS datset.<br>
  IndexFields CUSTNO<br>
  Datasource DETAIL, MasterFields CUSTNO.</p>
<p>Master fields relates to field names in DETAIL, that will be used with IndexFields 
  to perform a filter in<br>
  INMEMTOTAL dat