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 the topic named 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. It provides good background information for the geodatabase and how you can leverage it in your daily use.
Designing a geodatabase
This is a practical overview on design and a simple procedure you can follow to help you build your geodatabase.
Feature class design
This feature class design topic helps to explain why you would extend a feature class with additional capabilities (such as a topology, network, or terrain) and points you to more information on implementation.
Building a geodatabase
Get started by creating a new geodatabase. These two topics are useful here:
Adding datasets to your geodatabase
To begin populating the contents of your geodatabase, see An overview of adding datasets to the geodatabase.
Adding advanced data elements to your geodatabase
Geodatabase versioning and replication
Using SQL to access and work with the geodatabase
These topics cover the SQL interface to spatial types managed in enterprise geodatabases. The SQL interface is supported for Informix, DB2, Oracle, PostgreSQL, and SQL Server. See Geodatabase access using SQL.
Administering enterprise geodatabases
Installing, configuring, maintaining, and tuning enterprise geodatabases are covered in the Administering geodatabases topics.