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MySQL - delete row where column is null

6 points
Created by:
AnnLen
12870

Quick solution:

DELETE FROM `table_name` WHERE `column_name` IS NULL;

Sometimes your data can be an empty string. You can delete such rows with below query:

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

Practical example

To show how to delete rows with NULL values, we will use the following table:

MySQL - delete rows with NULL values - example data
MySQL - delete rows with NULL values - example data

Note:

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

Example

In this example, we will delete rows from users table with NULL value in email column.

Query:

DELETE FROM `users` WHERE `email` IS NULL;

Result:

MySQL - delete rows with NULL column values - result
MySQL - delete rows with NULL column values - result

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,
	`email` VARCHAR(50),
	PRIMARY KEY (`id`)
);

insert_data.sql file:

INSERT INTO `users`
	( `name`, `surname`, `email`)
VALUES
	('John', 'Stewart', 'john@email.com'),
	('Chris', 'Brown', NULL),
	('Kate', 'Lewis', NULL),
	('Ailisa', 'Gomez', 'ailisa@email.com'),
	('Gwendolyn', 'James', NULL),
	('Simon', 'Collins', NULL),
	('Taylor', 'Martin', NULL),
	('Andrew', 'Thompson', 'andrew123@email.com');

MySQL - Problems

MySQL - delete row where column is null
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