Thank you, TheOC, for the help! I could not find any older version than 11.2.x of jdbc driver but it doesn't seem to work, even after I added the parameter to spark config of the cluster I use to create the external connection. I guess I have to go back to the coding way to get the data out of the old database. I am not sure if databricks would spend any effort on this issue since it is a very old version of oracle, and they probably would advise to find some 3rd party connector/driver. I will let you know if I find anything. Thanks again for your help!