get the year out of timestamp sql

Question

Dear Stackoverflow users and contributers,

I have a problem extracting the year out of a mysql timestamp field. I managed to get it work with a datetime field using this method:

SELECT id FROM TABLE WHERE YEAR(creation_date) = 2010

CREATE TABLE IF NOT EXISTS `pub_media` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `parent_id` int(11) DEFAULT NULL,
  `title` text,
  `filename` text,
  `path` text,
  `serv_path` text,
  `type` enum('images','videos','files','audio','gallery') DEFAULT NULL,
  `keywords` text,
  `label_id` int(11) DEFAULT NULL,
  `creation_date` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00',
  `update_date` timestamp NOT NULL DEFAULT '0000-00-00 00:00:00' ON UPDATE CURRENT_TIMESTAMP,
  `rank` int(11) NOT NULL DEFAULT '0',
  `deleted` tinyint(1) NOT NULL DEFAULT '0',
  PRIMARY KEY (`id`)
) ENGINE=MyISAM  DEFAULT CHARSET=utf8 AUTO_INCREMENT=1 ;

Server version : 5.1.41 Is there a simalar way to perform this action on a timestamp field? I want to keep this action in my SQL statement and not try to move it to PHP or any other scripting language, if possible.

Thx in advance.

Answer 1

use CAST function :)

SELECT id FROM TABLE WHERE YEAR(CAST(creation_date AS DATE))=2010

should work with creation_date timestamp

[[edit]] ,added () around cast

Answer 2

What problem are you encountering, and can you include the output of CREATE TABLE in your question? This works for me on MySQL 5.1.41-3ubuntu12.3:

DROP TABLE IF EXISTS `table1`;

CREATE TABLE `table1` (
    `id` int(11) NOT NULL auto_increment,
    `ts` TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    PRIMARY KEY  (`id`)
) ENGINE=InnoDB;

INSERT INTO table1 (id) VALUES (1);

SELECT * FROM table1;
+----+---------------------+
| id | ts                  |
+----+---------------------+
|  1 | 2010-07-05 15:32:11 |
+----+---------------------+

SELECT id FROM table1 WHERE YEAR(ts) = 2010;
+----+
| id |
+----+
|  1 |
+----+

Answer 3

The following works ok,

SELECT id FROM TABLE WHERE DATE_FORMAT( creation_date,  "%Y" ) = "2010"

Formatting the data is really useful for queries like this, I have used it numerous times for breaking data down to 10 minute intervals for example...