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MySQL - concatenate multiple rows into one field
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In this article, we would like to show you how to concatenate multiple rows into one field in MySQL.
Quick solution:
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SELECT `column1`,2
GROUP_CONCAT(`column2` SEPARATOR 'separator') AS 'alias_name'3
FROM `table_name`4
GROUP BY `column1`;To show how to combine multiple rows into one field, we will use the following table:
Note:
At the end of this article you can find database preparation SQL queries.
In this example, we want to display all the colors and a list of people who like each color in one field.
Query:
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SELECT `favorite_color`,2
GROUP_CONCAT(`name` SEPARATOR ', ') AS 'people'3
FROM `users`4
GROUP BY `favorite_color`;Output:
Note:
You can add
DISTINCTclause to avoid duplicated names:xxxxxxxxxx1SELECT `favorite_color`,2GROUP_CONCAT(DISTINCT `name` SEPARATOR ', ') AS 'people'3FROM `users`4GROUP BY `favorite_color`;
create_tables.sql file:
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CREATE TABLE `users` (2
`id` INT(10) UNSIGNED NOT NULL AUTO_INCREMENT,3
`name` VARCHAR(50) NOT NULL,4
`favorite_color` VARCHAR(100) NOT NULL,5
PRIMARY KEY (`id`)6
);insert_data.sql file:
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INSERT INTO `users`2
( `name`, `favorite_color`)3
VALUES4
('Tom', 'red'),5
('Chris', 'green'),6
('Kate', 'blue'),7
('Jack', 'green'),8
('Mark', 'green'),9
('Ann', 'orange'),10
('Natalie', 'pink');