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MySQL | ADDDATE method

schedule Aug 12, 2023
Last updated
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MySQL
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MySQL's ADDDATE(~) method adds the specified time interval to a date or datetime value.

Syntax

SELECT ADDDATE(date, INTERVAL expr unit);
SELECT ADDDATE(date, days);

Parameters

1. date | date/datetime

The date or datetime to add the time interval to.

2. days | integer

The number of days to add to the provided date.

3. expr unit | integer with units

The interval to add to the provided date together with its units.

Refer to 'List of units' at the bottom of page for a valid list of units.

WARNING

Either the days or expr unit parameter must be specified, they cannot be used together.

Return value

The result of adding the specified interval to date.

Examples

Consider the following table about some students:

student_id

fname

lname

day_enrolled

age

username

1

Sky

Towner

2015-12-03

17

stowner1

2

Ben

Davis

2016-04-20

19

bdavis2

3

Travis

Apple

2018-08-14

18

tapple3

4

Arthur

David

2016-04-01

16

adavid4

5

Benjamin

Town

2014-01-01

17

btown5

The above sample table can be created using the code here.

Basic usage

To add 2 days to student enrollment dates:

SELECT fname, day_enrolled, ADDDATE(day_enrolled, 2)
FROM students;
+----------+--------------+--------------------------+
| fname | day_enrolled | ADDDATE(day_enrolled, 2) |
+----------+--------------+--------------------------+
| Sky | 2015-12-03 | 2015-12-05 |
| Ben | 2016-04-20 | 2016-04-22 |
| Travis | 2018-08-14 | 2018-08-16 |
| Arthur | 2016-04-01 | 2016-04-03 |
| Benjamin | 2014-01-01 | 2014-01-03 |
+----------+--------------+--------------------------+

To add 2 months to student enrollment dates:

SELECT fname, day_enrolled, ADDDATE(day_enrolled, INTERVAL 2 MONTH)
FROM students;
+----------+--------------+-----------------------------------------+
| fname | day_enrolled | ADDDATE(day_enrolled, INTERVAL 2 MONTH) |
+----------+--------------+-----------------------------------------+
| Sky | 2015-12-03 | 2016-02-03 |
| Ben | 2016-04-20 | 2016-06-20 |
| Travis | 2018-08-14 | 2018-10-14 |
| Arthur | 2016-04-01 | 2016-06-01 |
| Benjamin | 2014-01-01 | 2014-03-01 |
+----------+--------------+-----------------------------------------+

Negative intervals

To subtract 1 day from a date:

SELECT ADDDATE('2020-01-01', -1);
+---------------------------+
| ADDDATE('2020-01-01', -1) |
+---------------------------+
| 2019-12-31 |
+---------------------------+

Note that there is a separate method SUBDATE(~) specifically for subtracting intervals from a date / datetime.

List of units

The below table represents a list of units that are supported:

Unit

Expected Input Format

MICROSECOND

MICROSECONDS

SECOND

SECONDS

MINUTE

MINUTES

HOUR

HOURS

DAY

DAYS

WEEK

WEEKS

MONTH

MONTHS

QUARTER

QUARTERS

YEAR

YEARS

SECOND_MICROSECOND

'SECONDS.MICROSECONDS'

MINUTE_MICROSECOND

'MINUTES:SECONDS.MICROSECONDS'

MINUTE_SECOND

'MINUTES:SECONDS'

HOUR_MICROSECOND

'HOURS:MINUTES:SECONDS.MICROSECONDS'

HOUR_SECOND

'HOURS:MINUTES:SECONDS'

HOUR_MINUTE

'HOURS:MINUTES'

DAY_MICROSECOND

'DAYS HOURS:MINUTES:SECONDS.MICROSECONDS'

DAY_SECOND

'DAYS HOURS:MINUTES:SECONDS'

DAY_MINUTE

'DAYS HOURS:MINUTES'

DAY_HOUR

'DAYS HOURS'

YEAR_MONTH

'YEARS-MONTHS'

robocat
Published by Arthur Yanagisawa
Edited by 0 others
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