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MySQL - count characters in string (CHAR_LENGTH())
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In this article, we would like to show you how to count characters in string using CHAR_LENGTH() function in MySQL.
Quick solution:
SELECT CHAR_LENGTH ('string');
Simple example
In this example, we will count characters in dirask string.
Query:
SELECT CHAR_LENGTH ('dirask');
Result:
Practical example
To show how to count distinct values, 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 count the number of characters in name column from users table.
Query:
SELECT
`id`, `name`,
CHAR_LENGTH (`name`) AS 'characters_in_name'
FROM `users`;
Output:
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,
PRIMARY KEY (`id`)
);
insert_data.sql file:
INSERT INTO `users`
( `name`, `surname`)
VALUES
('John', 'Stewart'),
('Chris', 'Brown'),
('Kate', 'Lewis'),
('Ailisa', 'Gomez'),
('Gwendolyn', 'James'),
('Simon', 'Collins'),
('Taylor', 'Martin'),
('Andrew', 'Thompson');