OTN Appreciation is really an great idea by Tim Hall especially for bloggers, being blogger i love to add my post i.e on Oracle 12c new features DBMS_ROLLING.
This new advanced method implemented based on the traditional rolling upgrades of 11g feature, The beauty of this procedure in simple words is “This method can be completed within 5-6 major steps(excluding starting/stopping databases and so on. I have already wrote full article on this new feature and here is the URL for full article