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A view can contain all rows of a table or select rows from a table.A view can be created from one or many tables which depends on the written SQL query to create a view.
They can be used to provide row- or column-level access to data, to wrap up complex joins, to perform complex aggregate queries, and to otherwise customize the display of data. In this chapter, learn how to define, create, and modify views, and how to perform index analysis and optimize performance in SQL Server. The biggest problem is that just when you get used to accepting a limitation, Microsoft comes up with an amazing, new feature that overcomes it!In SQL, a view is a virtual table based on the result-set of an SQL statement.A view contains rows and columns, just like a real table.A view is nothing more than a SQL statement that is stored in the database with an associated name.A view is actually a composition of a table in the form of a predefined SQL query.