Updating Large SharePoint Lists

Question

I am accessing large (10,000+ line item) SharePoint lists from a Power Apps user interface.

I created the lists by exporting them from Excel. The list data is created in another system and the Excel spreadsheet is emailed to me at various times (no there is currently no API connections, discussions are ongoing).

If such functionality exists, what is the most efficient way to update each SharePoint list with fresh data when new Excel spreadsheets are sent to me?

Answer 1

It is not supported to update SharePoint lists from Excel data refresh. Once a list is created by using Export Table to SharePoint List, the list data will be Read-Only from Excel side (if you are not using programmatic methods).

If you are open for Power Automate, you can build a flow to update list data from Excel. Once the new spreadsheets arrive, you can update the source Excel spreadsheet so that the change will be applied to SharePoint as well.

See a reference here: Update Sharepoint List From Excel File.