10-1 Overview of views

Source: Internet
Author: User

A view is a query for a select in a database and is a virtual table.

Views can extract data from multiple tables, and can present data in the form of a single table.

Data is not stored in the view:

The data is stored in the original table referenced by the view.

An original table, depending on the needs of the user, can create more than n different views.

Similarities and differences between the query and the view:

Different points:

Storage: Views can be stored directly in the database, query to. SQL file is saved in the same way.

Sort on: To sort must have the top keyword, the query is not required.

Secure: The view can be encrypted and the query is not available.

The same point: All are defined with SQL statements.

How to create a view:

Create a view using SSMS.

Create a view using T-SQL statements.

There are two types of views here, one for your own view, and one for the system view.

10-1 Overview of views

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