Security
A relational database management system needs to control access to instances, databases, objects, and application packages. The two steps in controlling access are authentication and authorization. Authentication occurs when you provide a user ID and password. The password is used to prove your identity. Authorization occurs when the database verifies that you are allowed to perform a certain action. Typical actions include accessing, modifying, and deleting database objects.
Authentication
Authentication is required when connecting to a database or attaching to a database instance. A user ID is needed to uniquely identify a user. A password, known only to the user, is provided to validate the user's identity. The user ID is mapped to ...
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