EN
MySQL - find row with null value in column
0
points
In this article, we would like to show you how to find rows with NULL value in one of the columns in MySQL.
Quick solution:
SELECT *
FROM `table_name`
WHERE `column_name` IS NULL;
Sometimes your data can be an empty string. You can select such rows with the below query:
SELECT FROM `table_name` WHERE `column_name` = '';
Practical example
To show how to find rows with NULL value in one of the columns, 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 select rows from users table with NULL value in email column.
Query:
SELECT *
FROM `users`
WHERE `email` IS NULL;
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', 'andrew@email.com');