Review the different database configuration options.

You can create an Oracle database during the installation process. If you choose to create an Oracle database, Oracle Universal Installer uses Oracle Database Configuration Assistant to create it. You can create one of the preconfigured database types, which are designed for a variety of different applications, modify one of the preconfigured database types, or create a customized database to suit your own requirements.

• Creating a Database After Installation
  You can create a database after installation by using Oracle Database Configuration Assistant (Oracle DBCA).