When installing Oracle Software, you can create 12c CDB, PDB Databases using OUI, just like you used to do in the previous versions of the Oracle database.
A Quick Guide to upgrading to Oracle Database 12c. See how you can upgrade a database running in 18.104.22.168 (or lower) to the newest 12c database.
A quick guide of Oracle 12c RAC Installation on your laptop running on Windows. A step by step guide to configure Oracle 12c Grid and the database Software.
Quick install instructions for Oracle 12c database on Solaris 11. Check how you can install latest version of Oracle database on Oracle Solaris 11 running on Virtualbox.