OCR spreadsheet import

It would be great if AppSheet could take an imported spreadsheet from a user and put it in a table automatically or manually. They could see all of the column values for their table, and my table, and match them up, so that the columns would fill in underneath the columns on my table that have a match to their table. I would also like to be able to have a column in this form that is the automatic column A value for every row of these new rows. Thanks!