Oracle database user accounts (schemas) can be created:
within the Oracle database itself.
in Oracle Portal using the Schemas portlet on the Administer Database tab of the Portal home page.
Any privileges granted to the schema are valid only in the database itself, not in the Database Navigator.
Oracle Portal user accounts can be created:
on the Create Users page for the Single Sign-On Server.
in the Users portlet on the Administer tab of the of the Portal home page.
Any privileges on database objects granted to a portal user are valid only within Oracle9iAS Portal.
Managing users and groups
What are the different types of user accounts?
What is a portal administrator?
What is a public user?
What is an authorized user?
What users are created by default?