Search in the last excelsheettable which has be upload by user

Question

Hi All,
I have a CSV file with 4 columns(fromdate, todate, name, hours) and in the same way i do have 4 columns table named as excelsheettable, into this excelsheettable user will upload every month one CSV file and with the help of below all the information/data of the CSV file is loaded into excelsheettable
[http://advait.wordpress.com/2008/05/21/uploading-excel-sheet-using-oracle-application-express-apex/]
upto here everything is working very much fine as per my req.
Here excelsheettable will be having some previous records something like this :- (assume that still CVS is NOT yet uplaod by the user for the current month)
5/16/2009,6/15/2009,xyz,152
5/16/2009,6/15/2009,pqr,153
5/16/2009,5/29/2009,abc,100
6/02/2009,6/15/2009,abc,50
Now user uploads CVS file for the current month hence records into the excelsheettable will be something like this:-
5/16/2009,6/15/2009,xyz,152
5/16/2009,6/15/2009,pqr,153
5/16/2009,5/29/2009,abc,100
6/02/2009,6/15/2009,abc,50
(plus)
6/16/2009,7/15/2009,xyz,152
6/16/2009,7/15/2009,pqr,153
6/16/2009,6/28/2009,abc,90
7/02/2009,7/15/2009,abc,55
upto here also my req. is fullfilled (I mean excelsheettable is getting appended perfectly), but now I need to manipulated and calculated things for employee "xyz", "pqr" & "abc" only for existing CSV file which has been uploaded by the user, as this excelsheettable will be having 1000 of records for same employees which I dont want to get search into it.
Hence how can I do that, does anybody has idea.??, plz do lemme know if you need any more req.
Do anybody want to me set an example on apex workspaces.
Thanks
regards,
Deep
Edited by: user11086173 on Jul 22, 2009 12:43 PM

Answer 1

Deep,
If you can mark the already loaded rows in such a way after you process them, then when you do your calculations through a sql statement, you can use a where clause to look for ONLY those rows that haven't been marked as processed..
Thank you,
Tony Miller
Webster, TX