EN
MySQL - Delete query
3 points
In this article, we would like to show you how to make DELETE query in MySQL.
Quick solution:
xxxxxxxxxx1
DELETE FROM `table_name`2
WHERE `column_name` = some_value;Note:
where
some_valueis either a number or a string wrapped with single quotation marks''.
To show how DELETE statement works, we will use the following table:
Note:
At the end of this article you can find database preparation SQL queries.
In this example, we will delete user whose id = 8.
Query:
xxxxxxxxxx1
DELETE FROM `users`2
WHERE `id` = 8;Result:
In this example, we will delete user whose name = John.
Query:
xxxxxxxxxx1
DELETE FROM `users`2
WHERE `name` = 'John';Result:
create_tables.sql file:
xxxxxxxxxx1
CREATE TABLE `users` (2
`id` INT(10) UNSIGNED NOT NULL AUTO_INCREMENT,3
`name` VARCHAR(50) NOT NULL,4
`surname` VARCHAR(50) NOT NULL,5
`department_id` INT(10) UNSIGNED,6
`salary` DECIMAL(15,2) NOT NULL,7
PRIMARY KEY (`id`)8
); insert_data.sql file:
xxxxxxxxxx1
INSERT INTO `users`2
( `name`, `surname`, `department_id`, `salary`)3
VALUES4
('John', 'Stewart', 1, '3512.00'),5
('Chris', 'Brown', 2, '1344.00'),6
('Kate', 'Lewis', 3, '6574.00'),7
('Ailisa', 'Gomez', NULL, '6500.00'),8
('Gwendolyn', 'James', 2, '4200.00'),9
('Simon', 'Collins', 4, '3320.00'),10
('Taylor', 'Martin', 2, '1500.00'),11
('Andrew', 'Thompson', NULL, '2100.00');