If you are new to geodatabases or want to learn more, the following topics provide a good conceptual overview to get you started.
An overview of the geodatabase
The topics in this section of the help describe the fundamental contents for every geodatabase: tables, features, and rasters. Start with Table basics and read all the following topics in this help section.
The architecture of the geodatabase
The architecture of a geodatabase explains the geodatabase storage model and how it leverages relational database technology. This information is not required to use the geodatabase, but it provides good background information for the geodatabase and how you can leverage it in your daily use.
Building a geodatabase
Get started by creating a new geodatabase. The following two topics are useful:
When you want to work with multiuser geodatabases and distribute copies of your geodatabase across (and even outside) your organization, you can use versioning.