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MySQL - group rows by year
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In this article, we would like to show you how to group rows by year in MySQL.
Quick solution:
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SELECT2
DATE_FORMAT(`datetime_column_name`, '%Y') as `alias_name`3
FROM `table_name`4
GROUP BY YEAR(`datetime_column_name`);
To show how to group rows by year, 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 display all the years from the users table grouped, so we don't get any duplicates.
Query:
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SELECT2
DATE_FORMAT(`registration_time`, '%Y') as `date`3
FROM `users`4
GROUP BY YEAR(`registration_time`) DESC;Result:
Note:
Go to this article to read how to count rows per year.
create_tables.sql file:
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CREATE TABLE `users` (2
`id` INT(10) UNSIGNED NOT NULL AUTO_INCREMENT,3
`username` VARCHAR(50) NOT NULL,4
`registration_time` DATETIME NOT NULL,5
PRIMARY KEY (`id`)6
);insert_data.sql file:
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INSERT INTO `users`2
(`username`, `registration_time`)3
VALUES4
('Tom', '2021-01-01 11:41:31'),5
('Chris','2021-02-02 11:42:45'),6
('Jack','2021-03-03 15:13:39'),7
('Kim','2021-03-03 15:24:51'),8
('Marco','2020-03-03 22:35:38'),9
('Kate','2019-04-04 22:46:51'),10
('Nam','2019-04-04 22:57:37');