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MySQL - Create view if not exist
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In this article, we would like to show you how to create a view if it doesn't already exist in MySQL.
Quick solution:
CREATE VIEW IF NOT EXISTS `view_name` AS
SELECT `column1`, `column2`, ...
FROM `table_name`
WHERE condition;
Practical example
To show how the CREATE VIEW IF NOT EXIST
statement works, we will use the following table:
Note:
At the end of this article you can find database preparation SQL queries.
Example
In this example, we will create a view that shows all users from Spain if it doesn't already exist.
Query:
CREATE VIEW IF NOT EXISTS `Spain Users` AS
SELECT `name`, `email`
FROM `users`
WHERE `country` = 'Spain';
To see the view created with the query above simply use:
SELECT * FROM `Spain Users`;
Result:
Database preparation
create_tables.sql
file:
CREATE TABLE `users` (
`id` INT(10) UNSIGNED NOT NULL AUTO_INCREMENT,
`name` VARCHAR(100) NOT NULL,
`email` VARCHAR(100) NOT NULL,
`country` VARCHAR(15) NOT NULL,
PRIMARY KEY (`id`)
)
ENGINE=InnoDB;
insert_data.sql
file:
INSERT INTO `users`
(`name`, `email`, `country`)
VALUES
('Tom', 'tom01@email.com', 'Poland'),
('Chris','chris123@email.com', 'Spain'),
('Jack','jack32@email.com', 'Spain'),
('Kim','kim103@email.com', 'Vietnam'),
('Marco','marco942@email.com', 'Italy'),
('Kate','kate227@email.com', 'Spain'),
('Nam','nam393@email.com', 'Vietnam');