Hi @Lara_Bertini,
the MySQL node has some problems right now, like it won’t insert fields with a field name that contains a dash “-”, I guess there are also problems with accent symbols like è.
You can try to wrap all field names with special characters like you wrapped the data field like this:
The n8n team is already working on an overhaul of the MySQL node, I think this problem will be fixed with this MySQL node update. OneDrive excel import into Mysql Database - #7 by sirdavidoff