August 2009
Intermediate to advanced
960 pages
21h 21m
English
Content preview from Oracle SQL By Example
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Chapter 15. Security
Oracle protects the data in the database by implementing security via users, roles, and privileges. The SQL language commands used to accomplish these security tasks are known as Data Control Language (DCL) commands.
Oracle provides several different ways to enforce access control to ensure that only authorized users can log in and access the appropriate data. You want to avoid situations in which a user can accidentally drop an important table or sidestep security rules. Every database user has certain system privileges that determine the type of actions the user can perform, such as create tables, drop views, or create other ...
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