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Questions and Answers
What is the primary characteristic of a view in a database?
What is the primary characteristic of a view in a database?
What is the result of one or more relational operations operating on base relations?
What is the result of one or more relational operations operating on base relations?
When is a view produced in a database?
When is a view produced in a database?
What is the relationship between a view and a base relation?
What is the relationship between a view and a base relation?
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Why are views useful in a database?
Why are views useful in a database?
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What is the key difference between a view and a base relation in a database?
What is the key difference between a view and a base relation in a database?
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What happens when a view is requested in a database?
What happens when a view is requested in a database?
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What is the result of performing relational operations on base relations?
What is the result of performing relational operations on base relations?
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What is a common characteristic of a view in a database?
What is a common characteristic of a view in a database?
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What is the relationship between a view and the database?
What is the relationship between a view and the database?
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Study Notes
View
- A view is the dynamic result of one or more relational operations performed on base relations to produce another relation.
- It is a virtual relation that does not necessarily exist physically in the database.
- The view is generated upon request, at the time of the request.
- A view does not have a physical existence in the database until it is requested.
- It is produced dynamically by the database system when queried.
View
- A view is the dynamic result of one or more relational operations performed on base relations to produce another relation.
- It is a virtual relation that does not necessarily exist physically in the database.
- The view is generated upon request, at the time of the request.
- A view does not have a physical existence in the database until it is requested.
- It is produced dynamically by the database system when queried.
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Description
Learn about database views, virtual relations that are generated dynamically upon request. Understand how they are produced by the database system and their physical existence.