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MySQL | SUBDATE method

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Date and Time
schedule Mar 9, 2022
Last updated
local_offer MySQL
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MySQL's SUBDATE(~) method subtracts the specified interval from a date or datetime value.

Syntax

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

Parameters

1. date | date/datetime

The date or datetime to subtract the time interval from.

2. days | integer

The number of days to subtract from the provided date.

3. expr unit | integer with units

The interval to subtract from 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 subtracting the specified interval from date.

Examples

Consider the following information 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 subtract 2 days from student enrollment dates:

SELECT fname, day_enrolled, SUBDATE(day_enrolled, 2)
FROM students;
+----------+--------------+--------------------------+
| fname | day_enrolled | SUBDATE(day_enrolled, 2) |
+----------+--------------+--------------------------+
| Sky | 2015-12-03 | 2015-12-01 |
| Ben | 2016-04-20 | 2016-04-18 |
| Travis | 2018-08-14 | 2018-08-12 |
| Arthur | 2016-04-01 | 2016-03-30 |
| Benjamin | 2014-01-01 | 2013-12-30 |
+----------+--------------+--------------------------+

To subtract 2 months from student enrollment dates:

SELECT fname, day_enrolled, SUBDATE(day_enrolled, INTERVAL 2 MONTH)
FROM students;
+----------+--------------+-----------------------------------------+
| fname | day_enrolled | SUBDATE(day_enrolled, INTERVAL 2 MONTH) |
+----------+--------------+-----------------------------------------+
| Sky | 2015-12-03 | 2015-10-03 |
| Ben | 2016-04-20 | 2016-02-20 |
| Travis | 2018-08-14 | 2018-06-14 |
| Arthur | 2016-04-01 | 2016-02-01 |
| Benjamin | 2014-01-01 | 2013-11-01 |
+----------+--------------+-----------------------------------------+

Negative intervals

To add 1 day to a date:

SELECT SUBDATE('2020-01-01', -1);
+---------------------------+
| SUBDATE('2020-01-01', -1) |
+---------------------------+
| 2020-01-02 |
+---------------------------+

Note that there is a separate method ADDDATE(~) specifically for adding intervals to 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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