if you link the spreadsheet as a table and run an update query against your db table using the linked one as the source, then if there's updated data, it will overwrite. If there isn't, it won't make any difference. Unless you run an update when you shouldn't (for whatever reason that might be) then you can run it as many times as you want. No difference in source = no difference in target. You just have to decide how you want the query to be executed.
Last edited by Micron; 02-22-2019 at 02:28 PM.
The more we hear silence, the more we begin to think about our value in this universe.
Paraphrase of Professor Brian Cox.