You may be thinking of a Connected Sync table which is pulling in a CSV file from a cloud storage location like dropbox, box or google drive, or an SFTP path. When you do that, yes, you may specify from 1 to 4 of the CSV columns to use as the Refresh Key. QuickBase will automatically concatenate them together to make a "Refresh Key".
So, yes if you set up a table which is a Connected Sync table then it is very easy to upload CSV files because you just drop it into the file path and every hour Quickbase will go off and find any new files there and merge or add new records as required. The admin can also manually force a refresh of the Connected Sync table.
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Mark Shnier (YQC)
mark.shnier@gmail.com
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