In MariaDB, TIMESTAMPADD() is a built-in date and time function that adds an integer expression interval to a given date or datetime expression.

Syntax

The syntax goes like this:

TIMESTAMPADD(unit,interval,datetime_expr)

Where unit is one of the following values:

• MICROSECOND
• SECOND
• MINUTE
• HOUR
• DAY
• WEEK
• MONTH
• QUARTER
• YEAR

The units can optionally have a prefix of SQL_TSI_.

Example

Here’s an example to demonstrate:

SELECT TIMESTAMPADD(DAY, 10, '2030-02-01');

Result:

+-------------------------------------+
| TIMESTAMPADD(DAY, 10, '2030-02-01') |
+-------------------------------------+
| 2030-02-11                          |
+-------------------------------------+

Datetime Values

Here’s an example of passing a datetime value:

SELECT TIMESTAMPADD(HOUR, 10, '2030-02-01 10:30:45');

Result:

+-----------------------------------------------+
| TIMESTAMPADD(HOUR, 10, '2030-02-01 10:30:45') |
+-----------------------------------------------+
| 2030-02-01 20:30:45                           |
+-----------------------------------------------+

Adding a SQL_TSI_ Prefix

The unit can include a SQL_TSI_ prefix if required:

SELECT TIMESTAMPADD(SQL_TSI_YEAR, 10, '2030-02-01');

Result:

+----------------------------------------------+
| TIMESTAMPADD(SQL_TSI_YEAR, 10, '2030-02-01') |
+----------------------------------------------+
| 2040-02-01                                   |
+----------------------------------------------+

Microseconds

Here’s an example that adds microseconds:

SELECT TIMESTAMPADD(MICROSECOND, 123456, '2030-02-01 10:30:45');

Result:

+----------------------------------------------------------+
| TIMESTAMPADD(MICROSECOND, 123456, '2030-02-01 10:30:45') |
+----------------------------------------------------------+
| 2030-02-01 10:30:45.123456                               |
+----------------------------------------------------------+

Negative Intervals

Negative intervals are valid:

Example:

SELECT TIMESTAMPADD(YEAR, -10, '2030-02-01');

Result:

+---------------------------------------+
| TIMESTAMPADD(YEAR, -10, '2030-02-01') |
+---------------------------------------+
| 2020-02-01                            |
+---------------------------------------+

Current Date

We can pass NOW() as the datetime argument to use the current date and time:

SELECT 
    NOW(),
    TIMESTAMPADD(DAY, 10, NOW());

Result:

+---------------------+------------------------------+
| NOW()               | TIMESTAMPADD(DAY, 10, NOW()) |
+---------------------+------------------------------+
| 2021-05-28 09:58:56 | 2021-06-07 09:58:56          |
+---------------------+------------------------------+

Missing Argument

Calling TIMESTAMPADD() with the wrong number of arguments, or without passing any arguments, results in an error:

SELECT TIMESTAMPADD();

Result:

ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near ')' at line 1

And another example:

SELECT TIMESTAMPADD(10, '2020-12-09');

Result:

ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near '10, '2020-12-09')' at line 1