Since 11.2.0.4 is a patchset (not a base installer), you must first download the and then apply the 11.2.0.4 patchset . To find the patchset:
: Click on the link to start the download process. You may be prompted to log in with your Oracle account credentials. oracle database 11g release 2 11.2 0.4 download
If you are currently on an earlier version of 11g (like 11.2.0.1), upgrading to 11.2.0.4 provides: Since 11