hemant kumar
What is View?
1 Answer(s)      6 years and 4 months ago
Posted in : SQL

What is View?


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November 18, 2010 at 3:43 PM


A SQL View is a virtual table, which is based on SQL SELECT query. Essentially a view is very close to a real database table (it has columns and rows just like a regular table), except for the fact that the real tables store data, while the views don?t. The view?s data is generated dynamically when the view is referenced. A view references one or more existing database tables or other views. In effect every view is a filter of the table data referenced in it and this filter can restrict both the columns and the rows of the referenced tables.

The syntax for creating a VIEW is:

CREATE VIEW view_name AS
SELECT columns
FROM table
WHERE predicates;