I have a spreadsheet listing registered customers for a rewards card.
it includes customer id numbers, addresses and date of last use. the
issue is that there are many duplicate addresses and duplicate names.
i want to get rid of the duplicates based on the date of last use (in
other words, only keep the records of the rewards card the customer is
actually using, as opposed to the duplicates they have accumulated
over the years). i've tried toying with the advanced filter and all
kinds of sorts, all to no avail. any help would be GREATLY
appreciated. thanks.