To get the final, stable version (11.2.0.4), you generally need a support contract to download the patch. But , if you search Oracle Support (Doc ID 1563792.1), you can sometimes find the "Patch Set" if your account is linked to a valid CSI (Customer Support Identifier).

If you’ve landed on this page, you are likely in one of two camps. First, you are a student trying to learn SQL on a classic, stable platform. Second—and more likely—you are a developer or DBA tasked with maintaining a legacy application that refuses to die (in a good way).

Oracle Database 11g (specifically 11g Release 2, 11.2.0.4) is the "golden oldie" of the enterprise world. While Oracle has moved on to 19c and 23ai, many production systems still run on 11g.