This video shows how to work with CSV data in your surveys using the select_one_from_file and select_multiple_from_file question types and the search() appearance to populate choice lists, and the pulldata() function to look up values. This video also demonstrates how to link CSV files stored in your ArcGIS organization to your surveys.

To learn more, please visit:
External choice lists
Search appearance
Work with external content

To learn more about ArcGIS Survey123, visit the ArcGIS Survey123 Resources page.