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Database software that is already installed on your computer, install new Oracle Database software, and deinstall Oracle Database software that you no longer intend to use. Online Help is available to guide you through the installation process.
During the installation process, you are given the opportunity to create a database. If you choose to do so, OUI automatically starts Oracle Database Configuration Assistant (DBCA) to guide you through the process of creating and configuring a database.
If you do not create a database during installation, then you must run DBCA at some point after installation to create a database.