>after some correction now it is working
>
>your code
>
>

>SELECT sales.billno,sales.billdt, sales.accode, acmast.acname, acmast.opamt, sales.qty, sales.amt, cast(0 as I) as idTemp ;
>FROM sales ;
>LEFT JOIN acmast ON sales.accode=acmast.accode INTO CURSOR tempcurs READWRITE 
>
>update tempcurs set idTemp = recno()
>select acname, min(idTemp) from tempCurs into filtCurs group by 1
>update tempcurs set opamt = 0 where idTemp not in ;
>  Select idTemp from FiltCurs 
>
>

>
>Code after Correction
>
>

>SELECT sales.billno,sales.billdt, sales.accode, acmast.acname, acmast.opamt, sales.qty, sales.amt, cast(0 as I) as idTemp ;
>FROM sales ;
>LEFT JOIN acmast ON sales.accode=acmast.accode INTO CURSOR tempcurs  ORDER BY 3 READWRITE 
>
>update tempcurs set idTemp = recno()
>select acname, min(idTemp) as idTemp from tempCurs into CURSOR filtCurs group by 1
>update tempcurs set opamt = 0 where idTemp not in ;
>  (Select idTemp from FiltCurs )
>  
>  SELECT tempcurs 
>  BROWSE 
>

>
>warm regards,
>mk.

This will work only for the same account. If you have multiple accounts and want to show the top value for each account, it will not work.