Hi everyone I am New in the forum, before start asking I just want to say that somebody install and develop web service that will tracking vehicle where XY Coordinate and all vehicle information is sending from Oracle 11g Database server to Arcgis Map and with those information the vehicle will display on Arcgis Map in real-time. however this was 3 year ago and now I have to try to upgrade new web service to work with Arc Map but problem is the guy who did web service and database connection is gone, no detail information was given so I just wondering is it possible to determine which table inside database is use to show XY Coordinate on Map. Thank you for your help