When you install the RDBMS, if you choose to create the database, you can choose the installation of the Oracle examples.
Here I’ll show you how to install the Oracle examples if you choose to install just the RDBMS without any database.
In these examples, there is a set of scripts to configure the HR schema with some objects to be used in any SQL or PL/SQL tests.
This is valid for the 11g version, the most mature right now. However, you must consider that there is the 12c version and will be more versions later. Read more of this post