Data Source=//hostname:1521/service_name; User Id=scott; Password=tiger; Or using TNS entry:
Here’s a concise, informative piece on : Oracle ODAC 19c: Overview & Key Role oracle odac 19c
is the version aligned with Oracle Database 19c (the long-term release of the 19c database family). It provides the essential connectivity layer for developers and systems integrators. oracle odac 19c
