Hi Suman,
To connect to Oracle 12C pluggable database (PDB), we need to connect using service name. when i tried to update the JDBC URL with no SID it fails to connect and i get an error like [CA Clarity][Oracle JDBC Driver][Oracle]ORA-12505 Connection refused, the specified SID (Null) was not recognized by the Oracle server.
I am not sure if SID is mandatory to establish a connection to database from clarity.