To create a connection to the OE schema:
1- In the System Navigator, right-click on the Connections node and choose New Database Connection.The Connection Wizard opens.
2- Review the information on the Welcome page and click Next.
3- On the Type page, In the Connection name field, enter tutorial_jdbc_connection and click Next.
4- On the Authentication page, type OE for both the name and password, and select the checkbox to Deploy Password. Click Next.
5- On the Connection page, enter the Host name, JDBC port, and SID of the database you are connecting to and click Next. If you do not know these values, contact your database administrator.
6- On the Test page, click Test Connection. You should see the message "Success". If you get an error, verify your connection data with your database administrator.
7- Click Finish to create your connection.
In the System Navigator, under your Connections node, you'll see a new folder for database connections, and within that, your OrderEntry connection. Expand the folders and navigate to the tables in the OE schema, as in the following picture: In the next step you will drag and drop these tables to create a class diagram.