I only have SQL Developer installed. What other programs do I need to install to create a local database. Please provide links.

I only have SQL Developer installed. What other programs do I need to install to create a local database. Please provide links.

SQL Developer is a client that access to a database server to extract data.
You need a database server.
If you operate with SQLDeveloper probably you like to install Oracle. There is a simplified version of Oracle that is called Oracle-XE. Search it over google and download the right version for your operating system.