When using the BDE, your application uses a variation of the general database architecture described in Database Architecture. In addition to the user interface elements, datasource, and datasets common to all Delphi database applications, A BDE-based application can include

• One or more database components to control transactions and to manage database connections.
• One or more session components to isolate data access operations such as database connections, and to manage groups of databases.

The relationships between the components in a BDE-based application are illustrated in the following figure: 

 

The following topics provide additional information about these components:

• Using BDE-enabled Datasets
• Connecting to Databases with TDatabase
• Managing Database Sessions