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MySQL - count rows per year
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In this article, we would like to show you how to count rows per year in MySQL.
Quick solution:
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SELECT2
DATE_FORMAT(`datetime_column_name`, '%Y') as `alias_name1`,3
COUNT(*) as `alias_name2`4
FROM `table_name`5
GROUP BY YEAR(`datetime_column_name`)6
ORDER BY `alias_name2` DESC;
To show how to count rows per 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 the year and the number of registered users for each year in descending order.
Query:
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SELECT2
DATE_FORMAT(`registration_time`, '%Y') as `date`,3
COUNT(*) as `count`4
FROM `users`5
GROUP BY YEAR(`registration_time`)6
ORDER BY `count` DESC;Result:
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');