tables data update via csv

Hello.
Is there a feature permitting me to update existing tables via csv? I mean, if I use the export link, the system gives me a downloadable csv. If I use the import link (even if file name is the same of an existing table) the system always creates a new table, but obviously with a different (and so useless) shortcode. I’d like to to modify csv offline and then using that csv to update an existing table.
Is this possible? Many thanks, bye.