hi expert,
is there a way on how to summarize the previous function in crystal report
on details
Numatcard U_40STD
1234 2
1234 2
1234 2
--------------------------------------
output
If ({OINV.NumAtCard} = previous({OINV.NumAtCard})) then 0 else {OINV.U_40STD}
2
0
0
----------------
footer - SUM here should be 2
Note i need to summarize this the whole detail so that later on i want to use this on CrossTab
Thank you
regards
silent