Hi Ramusmartguy, assuming that you can query external database via FDA connector.
If this is the case, you should create data schema of external table in AC and then in workflow read data from excel and write to the newly created schema/table. Data will be reflected on external database.
There is an example of that schema:
First blue line is hiding internal name of your FDA connector.
Second blue line is hiding database_schema.table_name in external database.