Oracle 12c R2 database available to on-premise

Released in 2013 to all customers (on-premise and cloud / DBaaS), 12c was available for purchase or upgrade for any customer.  However, Oracle 12C R2 is Oracle Corporation's first database release available only to database cloud (DBaaS) customers, in October 2016.  In order to boost 'cloud' revenues, the Oracle 12c R2 version was no where [...]