Open the DRM Console.
Click Add and key in the details for the data base related and test the connection.
Click the repository creation wizard.
Here you have two options,
1) You can create the repository using DB - Admin credentials.
2) Generate the SQL scripts and hand them to DBA to execute the create scripts.
I am using the 2nd option here.
Click Next and modify the details according to your needs.
Click on "BACKUP FILE"
Click Next and save the file.
Have the scripts executed in the DB.
Confirm the DB connection details in the repository configuration.
Test the connection via web client.
Login: Admin/Welcome! <-- If you created the repository using scripts.