While 11g XE was a staple for many years, Oracle has since released newer versions of the Express Edition.
A Look Back: Oracle Database Express Edition 11g Release 2 for Windows x64
Up to 11 GB of actual user data storage (excluding system tablespaces). While 11g XE was a staple for many
Oracle Database XE is the "light" version of Oracle’s flagship enterprise database. It is designed to be easy to install, manage, and develop with. Unlike the Standard or Enterprise editions, which require paid licenses and are highly scalable, XE is free to develop, deploy, and distribute.
Oracle enforces strict resource limits within the Express Edition software layer. The database engine automatically limits consumption regardless of your actual physical hardware capacity: It is designed to be easy to install,
Execution is restricted to only one CPU core on the host server.
For those working with legacy systems or learning Oracle SQL on older hardware, remains a notable release. XE is free to develop
Released in 2011, this version brought a native 64-bit installer for Windows, allowing developers to leverage more memory than the 32-bit edition. It was a significant step up from the original XE release.