Quickbase is not like Excel where you can just make a formula between rows, so the the complexity of the answer depends on how flexible your requirements are.
To answer your question literally, I suggest making a table of Years where the Key field is the numeric Year. Then make a relationship from there to your detail records to sum up the total sales for the Year. Then make a relationship between Years and itself. For the Related Year field change the next to [
Last Year] and change it to be a formula numeric field with a formula of
[Year]-1
That will allow you to pull last years Sales into the current year record and then you can do your calculations.
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Mark Shnier (Your Quickbase Coach)
mark.shnier@gmail.com
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