Cumulative Row Count

Robert_Krystal_(calgaryuser5_-_(deleted))

I would like to generate a report with a cumulative count. I cannot use rownum as the result set is ordered. Does anyone know of way in Oracle I could do this?ie:Dataid Name RowNum Count1234 aaa 2 1 1236 aba 4 2 123 abb 1 3 1235 abc 3 4 Thanks in advance,Greg