Meeting Users' Needs
No two database systems are the same. Some may be composed of data that is accessed only through canned programs that are fully optimized. Others may be decision support applications that see a lot of nonstructured, ad hoc query activity. Others may have data that remains in the system for years. Still others may move data through the system in a day and then throw it away. These different modes of use and purpose must be understood by the DBA if he is to manage the entire system.
The purpose of the database is to make the information contained in the database tables accessible in some form to the users. The most controlled access is a system of structured access in which all data flows through well-defined programs. This ...
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