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Oracle: What is a view?

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Oracle: What is a view?
posted Sep 7, 2015 by Suchithra

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View is the simply subset of table which are stored logically in a database means a view is a virtual table in the database whose contents are defined by a query.

To the database user, the view appears just like a real table, with a set of named columns and rows of data. SQL creates the illusion of the view by giving the view a name like a table name and storing the definition of the view in the database.

Views are used for security purpose in databases,views restricts the user from viewing certain column and rows means by using view we can apply the restriction on accessing the particular rows and columns for specific user. Views display only those data which are mentioned in the query, so it shows only data which is returned by the query that is defined at the time of creation of the View.

answer Sep 7, 2015 by Shivaranjini