SQL View

A view in SQL is a virtual table stored in the database with an associated name. It is created using a predefined SQL query and can contain rows from one or multiple tables (all or selected). Views do not physically store data unless they are indexed.

Key Features of SQL Views

• Structure data for better readability and user understanding.
• Restrict access to specific data while ensuring users can see what they need.
• Summarize data from multiple tables to simplify reporting and analysis.

Creating a View

Use the CREATE VIEW statement to create a view in SQL. Below is the basic syntax:

Example

Let’s create a view named CUSTOMERS_VIEW from the CUSTOMERS table:

Creating a View with WHERE Clause

To filter specific records, use the WHERE clause while creating a view. Example:

WITH CHECK OPTION Clause

The WITH CHECK OPTION ensures all updates or inserts in the view satisfy the specified conditions: