Finally Oracle 12cR2 documentation is here
Also All Books for Oracle® Database Online is here

Oracle Just Announced the availability of Oracle database 12cR2 Exadata/SuperCluster On their website, In Case you want to upgrade
You can download oracle Enterprise edition 12cR2 from Oracle E delivery
Here
Follow the steps :-


Oracle Database 12c Release 2 is now available for Linux, Oracle Solaris SPARC, Oracle Solaris Intel 
If you own a Samsung Galaxy A7, it’s very common to forget the passcode and then need to reset the password. Many solutions to reset the password on the Galaxy A7 require completing a hard factory reset which can delete all your files and data on the smartphone. For those that don’t have their Samsung Galaxy backed up, we’ve created several different ways to reset the password on the Galaxy A7 when locked out without having to lose data or files. The following is a guide that will teach you three different ways how to reset the lock screen password on the Galaxy A7 when you get locked out.
Reset Password with Factory Reset
Read this guide to learn an alternative method to factory reset the Galaxy A7. It’s important to note that before you go to do a factory reset on the Galaxy A7, you should back up all files and information to prevent any data from being lost.
Reset Password with Samsung Find My Mobile
Another method would be to use Samsung’s Find My Mobile (Find My Android), similar to Find My iPhone. You can use the “Remote Controls” feature on your Samsung Galaxy A7 which will allow you to temporarily reset the password and bypass the lock screen on the Galaxy A7. If you have not already registered the Galaxy A7 with Samsung, try registering it as soon as possible
Password Reset with Android Device Manager
The first way to reset the password on both the Galaxy A7 is for those that have already registered their Galaxy A7 with Android Device Manage. When using Android Device Manger to reset the password, all you need to do is activate the “Lock” feature. The “Lock” feature on Android Device Manger will allow you to get the Galaxy A7 password to reset when you have forgotten the password on the Galaxy A7. Follow the instructions below: