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Tera-Tom Genius Series - Oracle SQL by Leona Coffing, Tom Coffing

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Chapter 11 – View Functions

"Be the change that you want to see in the world."

- Mahatma Gandhi

The Fundamentals of Views

View Fundamentals

A view is a virtual table.

A view may define a subset of columns.

A view can even define a subset of rows if it has a WHERE clause.

A view never duplicates data or stores the data separately.

Views provide security.

View Advantages

An additional level of security is provided.

Helps the business user not miss join conditions.

Help control read and update privileges.

Unaffected when new columns are added to a table.

Unaffected when a column is dropped unless its referenced in the view.

The above is designed to introduce View fundamentals, View advantages and View recommendations.

Creating a Simple View ...

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