hi there

here is an Example. there are 2 groups in a company with 2 employees each with the following pay.

GROUP 1

    A.........10

    B..........20

Group 2

   C.........30

   D.........40

i cudnt think of any names....so bear with me.

Now a AGGREGATE component will produce a output of 100 (i.e 10+20+30+40)

and a ROLLUP will produce a output as

Group 1.......30

Group 2.......70.

i hope this explains you all. (i know its a bad example)

thanx