Hello @Frank Wagner​ 

Thank you for posting to Databricks Community Forum

It seems like there is not enough documentation around JDBC connectivity

Seems like there are a few commercial connectors

https://www.cdata.com/drivers/servicenow/jdbc/

https://www.unityjdbc.com/servicenow/servicenow_jdbc.php

Can you please contact ServiceNow support team, if you are already using the product?