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Oracle: What are the advantages of VIEW?

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Oracle: What are the advantages of VIEW?
posted Sep 7, 2015 by Suchithra

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Advantages of views

Security

Each user can be given permission to access the database only through a small set of views that contain the specific data the user is authorized to see, thus restricting the user's access to stored data

Query Simplicity

A view can draw data from several different tables and present it as a single table, turning multi-table queries into single-table queries against the view.

Structural simplicity

Views can give a user a "personalized" view of the database structure, presenting the database as a set of virtual tables that make sense for that user.

Consistency

A view can present a consistent, unchanged image of the structure of the database, even if the underlying source tables are split, restructured, or renamed.

Data Integrity

If data is accessed and entered through a view, the DBMS can automatically check the data to ensure that it meets the specified integrity constraints.

Logical data independence.

View can make the application and database tables to a certain extent independent. If there is no view, the application must be based on a table. With the view, the program can be established in view of above, to view the program with a database table to be separated.

answer Sep 7, 2015 by Shivaranjini
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