Many customers will be aware that the April 2021 Release Update( RU) for Oracle Database 19c - RU 19.11 - was recently made available for download on My Oracle Support (MOS). Make sure to check out Mike Dietrich's blog post on upgrading to the latest RU 19.11.
Customers should also be aware that the latest Oracle Database 19c 'New Features Guide' has been updated to reflect what's new in each Oracle Database 19c RU (in addition to original set of new features introduced). Worthy of note is that a few of the new features introduced in Oracle Database 21c have since been backported to Oracle Database 19c, including SQL (Table) Macros (RU 19.7) and Blockchain Tables (RU 19.10), plus Immutable Tables (RU 19.11).
BTW, the Oracle Database Features and Licensing App (pictured below) has also been updated to reflect new features that have since become available to base releases with recent RUs.
For more information on Oracle Database, visit Oracle.com/database/technologies.