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MySQL - Delete query

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Created by:
illona
346

In this article, we would like to show you how to make DELETE query in MySQL.

Quick solution:

DELETE FROM `table_name`
WHERE `column_name` = some_value;

Note:

where some_value is either a number or a string wrapped with single quotation marks ''.

Practical example

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

Data used with DELETE statement in MySQL.
Data used with DELETE statement in MySQL.

Note:

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

Example 1

In this example, we will delete user whose id = 8.

Query:

DELETE FROM `users`
WHERE `id` = 8;

Result:

MySQL - DELETE statement result (in HeidiSQL)
MySQL - DELETE statement result (in HeidiSQL)

Example 2

In this example, we will delete user whose name = John.

Query:

DELETE FROM `users`
WHERE `name` = 'John';

Result:

MySQL - DELETE statement result (in HeidiSQL)
MySQL - DELETE statement result (in HeidiSQL)

Database preparation

create_tables.sql file:

CREATE TABLE `users` (
	`id` INT(10) UNSIGNED NOT NULL AUTO_INCREMENT,
	`name` VARCHAR(50) NOT NULL,
	`surname` VARCHAR(50) NOT NULL,
	`department_id` INT(10) UNSIGNED,
    `salary` DECIMAL(15,2) NOT NULL,
	PRIMARY KEY (`id`)
);

 insert_data.sql file:

INSERT INTO `users`
	( `name`, `surname`, `department_id`, `salary`)
VALUES
	('John', 'Stewart', 1, '3512.00'),
	('Chris', 'Brown', 2, '1344.00'),
	('Kate', 'Lewis', 3, '6574.00'),
	('Ailisa', 'Gomez', NULL, '6500.00'),
	('Gwendolyn', 'James', 2, '4200.00'),
	('Simon', 'Collins', 4, '3320.00'),
	('Taylor', 'Martin', 2, '1500.00'),
	('Andrew', 'Thompson', NULL, '2100.00');

MySQL

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