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MySQL CREATE VIEW Statement

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. The fields in a view are fields from one or more real tables in the database.

You can add SQL statements and functions to a view and present the data as if the data were coming from one single table.

A view is created with the CREATE VIEW statement.

CREATE VIEW Syntax

Note: A view always shows up-to-date data! The database engine recreates the view, every time a user queries it.

MySQL CREATE VIEW Examples

The following SQL creates a view that shows all customers from Brazil:

Example

We can query the view above as follows:

Example

SELECT * FROM [Brazil Customers];

The following SQL creates a view that selects every product in the "Products" table with a price higher than the average price:

Example

We can query the view above as follows:

Example

MySQL Updating a View

A view can be updated with the CREATE OR REPLACE VIEW statement.

CREATE OR REPLACE VIEW Syntax

The following SQL adds the "City" column to the "Brazil Customers" view:

Example

MySQL Dropping a View

A view is deleted with the DROP VIEW statement.

DROP VIEW Syntax

The following SQL drops the "Brazil Customers" view:

Example

DROP VIEW [Brazil Customers];

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MySQL CREATE VIEW, REPLACE VIEW, DROP VIEW Statements

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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. The fields in a view are fields from one or more real tables in the database.

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DIFERENÇAS DE STORED PROCEDURES, FUNCTIONS E VIEWS

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DIFERENÇAS DE STORED PROCEDURES, FUNCTIONS E VIEWS