See in details the sources available to load or connect your data: you can choose among spreadsheet, clipboard/notes or database; or just connect from the Library the Data Definitions you have saved previously.
Do you need a sample data file? (e.g. "Sales 2018")
Download a spreadsheet here
Discover two ways to merge different files into just a single Analysis. Unify or link sources that have in common all the columns or just some of them: that's what Automatic Union does.