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MySQL - Update statement

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In this article, we would like to show you how to use UPDATE statement in MySQL.

Quick solution:

UPDATE `table_name`
SET `column1` = value1, `column2` = value2, ...
WHERE condition;

Note:

Be careful when updating records. If you omit the WHERE clause, all records will be updated!

Practical example

To show how the UPDATE statement works, we will use the following table:

MySQL - example data used with UPDATE statement
MySQL - example data used with UPDATE statement

Note:

At the end of this article you can find database preparation SQL queries.

Example

In this example, we will update information about moderator Chris.

Query:

UPDATE `users` 
SET `name` = 'Christopher' , `role` = 'admin' 
WHERE `id` = 2;

Output:

MySQL - UPDATE statement result
MySQL - UPDATE statement result

Database preparation

create_tables.sql file:

CREATE TABLE `users` (
	`id` INT(10) UNSIGNED NOT NULL AUTO_INCREMENT,
	`name` VARCHAR(100) NOT NULL,
	`role` VARCHAR(15) NOT NULL,
	PRIMARY KEY (`id`)
)
ENGINE=InnoDB;

insert_data.sql file:

INSERT INTO `users`
	(`name`, `role`)
VALUES
	('John', 'admin'),
	('Chris', 'moderator'),
	('Kate', 'user'),
	('Denis', 'moderator');

MySQL

MySQL - Update statement
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