This is a read-only copy of the MariaDB Knowledgebase generated on 2024-11-21. For the latest, interactive version please visit https://mariadb.com/kb/.

TIMESTAMPDIFF

Syntax

TIMESTAMPDIFF(unit,datetime_expr1,datetime_expr2)

Description

Returns datetime_expr2 - datetime_expr1, where datetime_expr1 and datetime_expr2 are date or datetime expressions. One expression may be a date and the other a datetime; a date value is treated as a datetime having the time part '00:00:00' where necessary. The unit for the result (an integer) is given by the unit argument. The legal values for unit are the same as those listed in the description of the TIMESTAMPADD() function, i.e MICROSECOND, SECOND, MINUTE, HOUR, DAY, WEEK, MONTH, QUARTER, or YEAR.

TIMESTAMPDIFF can also be used to calculate age.

Examples

SELECT TIMESTAMPDIFF(MONTH,'2003-02-01','2003-05-01');
+------------------------------------------------+
| TIMESTAMPDIFF(MONTH,'2003-02-01','2003-05-01') |
+------------------------------------------------+
|                                              3 |
+------------------------------------------------+

SELECT TIMESTAMPDIFF(YEAR,'2002-05-01','2001-01-01');
+-----------------------------------------------+
| TIMESTAMPDIFF(YEAR,'2002-05-01','2001-01-01') |
+-----------------------------------------------+
|                                            -1 |
+-----------------------------------------------+

SELECT TIMESTAMPDIFF(MINUTE,'2003-02-01','2003-05-01 12:05:55');
+----------------------------------------------------------+
| TIMESTAMPDIFF(MINUTE,'2003-02-01','2003-05-01 12:05:55') |
+----------------------------------------------------------+
|                                                   128885 |
+----------------------------------------------------------+

Calculating age:

SELECT CURDATE();
+------------+
| CURDATE()  |
+------------+
| 2019-05-27 |
+------------+

SELECT TIMESTAMPDIFF(YEAR, '1971-06-06', CURDATE()) AS age;
+------+
| age  |
+------+
|   47 |
+------+

SELECT TIMESTAMPDIFF(YEAR, '1971-05-06', CURDATE()) AS age;
+------+
| age  |
+------+
|   48 |
+------+

Age as of 2014-08-02:

SELECT name, date_of_birth, TIMESTAMPDIFF(YEAR,date_of_birth,'2014-08-02') AS age 
  FROM student_details;
+---------+---------------+------+
| name    | date_of_birth | age  |
+---------+---------------+------+
| Chun    | 1993-12-31    |   20 |
| Esben   | 1946-01-01    |   68 |
| Kaolin  | 1996-07-16    |   18 |
| Tatiana | 1988-04-13    |   26 |
+---------+---------------+------+
Content reproduced on this site is the property of its respective owners, and this content is not reviewed in advance by MariaDB. The views, information and opinions expressed by this content do not necessarily represent those of MariaDB or any other party.