How to Patch / Upgrade APEX 4.2.0 That Is Installed by Default in a 12c Multitenant DB
(Doc ID 1611987.1)
Last updated on FEBRUARY 18, 2019
Applies to:Oracle Application Express (APEX) - Version 4.2.0.00.27 and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Oracle Database Cloud Exadata Service - Version N/A and later
Oracle Database Cloud Service - Version N/A and later
Information in this document applies to any platform.
When installing a 12c DB (188.8.131.52.0) the APEX version installed in the multinenant architecture - CDB$ROOT, PDB$SEED, and any created PDB - is APEX 4.2.0.00.27. The goal is to upgrade APEX to the most current version. The simplest method of doing this is to follow the patching procedure for the version you desire. For example, if you want to patch to 4.2.6, see 3.1 About Installing in Oracle Database 12c.
However, there may be some cases where you wish to remove the existing version of APEX completely and do a completely new installation.
The information in this note is based on the information from Jason Straub's Blog.
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