If you want to create an internal database connection, you must do it in the Outline pane by selecting the Connections item, right-clicking this item, selecting Connections → Create DB connection.

Figure 33.1. Creating Internal Database Connection

A Database connection wizard opens. (You can also open this wizard when selecting some DB connection item in the Outline pane and pressing Enter.)

See Database Connection Wizard for detailed information about how database connection should be created.

When all attributes of the connection has been set, you can validate your connection by clicking the Validate connection button.

After clicking Finish, your internal database connection has been created.