https://pandas.pydata.org/pandas-docs/version/0.23.4/generated/pandas.DataFrame.to_sql.html
https://stackoverflow.com/questions/26521266/using-pandas-to-pd-read-excel-for-multiple-worksheets-of-the-same-workbook
https://www.digitalocean.com/community/tutorials/pandas-read_excel-reading-excel-file-in-python