It is currently possible to import from a xlsx file exclusively at the moment. Other options are on the product roadmap but defined timelines for this feature (import from a data base table, qvw or sense app) are not available at this time.
See link below for import detail solution.
Open the 'examples.zip' file at the bottom of this page to retrieve the import file that you need to use.
You can also link directly to this file here: