Hello YusufKhan,
The only certified Database to use with DLP is Oracle. So if you change the database Symantec is not going to give you technical support.
I'm not a DBA, maybe and just maybe someone with a very deep knowledge of Oracle and other DB could be able to create or migrate the schama and point DLP to another server... Just maybe.... But.... Why do you want to change the DB to another vendor?
In regards of the second question the answer is no, you can not see that information from the Enforce console. However if you need to know or modify which database your Enforce is using as a workaround you may check the jdbc.properties file located on Vontu\protect\config\. Open the file and look for the jdbc.dbalias.oracle-thin line. There you find the SID, port, user nameand address/FQDN information.
I hope this information helps.
Cheers,
Chopper