Hi Neetoo,
for such kind of questions the SiteScope manual set is your best friend.
Check out this one:
HPE SiteScope Software Version: 11.32 Monitor Reference
Chapter 22: Database Query Monitor
..
Supported Platforms/Versions
This monitor supports monitoring on any database with a valid JDBC driver that supports SQL queries.
..
So all you need to find is a suitable JDBC driver which support Oracle 12c,
for example via
http://www.oracle.com/technetwork/database/features/jdbc/jdbc-drivers-12c-download-1958347.html
Then
..
You must install or copy a compatible JDBC database driver or database access API into the required
SiteScope directory location.
Many database driver packages are available as compressed (zipped) archive files or .jar files. Copy the
downloaded driver file into the <SiteScope root directory>\WEB-INF\lib subdirectory. If the file is in zip
format, unzip the contents to a temporary directory. Stop and restart the SiteScope service after copying
the driver file to the SiteScope machine.
..
and you are done.
If you are looking at specific Oracle monitor:
Oracle 10g Application Server Monitor, Oracle 9i Application Server Monitor
they obviously don't support Oracle 12
but this one does:
Chapter 75: Oracle Database Monitor
Supported Platforms/Versions
The monitor supports monitoring server performance statistics from Oracle Database 8i, 9i, 10g, 11i, 11g R2
(11.2.0.1), 11g R2 Real Application Clusters (RAC), and 12c (12.1.0.1) servers.
Greetings
Siggi