Oracle's support strategy for its products is difficult for most people to figure out, for Oracle Database 11g support cycle, a lot of friends have raised objections, refer to some of the documents mentioned below, I hope to help you understand Oracle's product support strategy.
In the MOS Support site, note 742060.1 Records detailed information that clearly identifies the current support policies and cycles for Oracle database products.
Note that the red represents the version sequence in the illustration, ES is the extended support period, there is a free period and a payment period (but only if you must have a basic service to enter the Extended support period), Green represents the minor patch information, and the end of each patch is the last support period for that version. Service support will no longer be available after the final support period.
Depending on the end date of the patch we can see that the abort period for Oracle 11GR2 11.2.0.3 is 2015-aug-27, so if we choose 11g Now, we should select the 11.2.0.4 version, which eventually supports the 2018-jan-31, There is a long life cycle.