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MySQL | DAYOFMONTH method

schedule Aug 12, 2023
Last updated
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MySQL
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MySQL's DAYOFMONTH(~) method returns the day portion (1-31) of a given date or datetime.

Parameters

1. date | date/datetime

The date/datetime to retrieve the day from.

Return value

The day portion (1-31) of the input date or datetime.

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 return the day that current students enrolled:

SELECT fname, DAYOFMONTH(day_enrolled)
FROM students;
+----------+--------------------------+
| fname | DAYOFMONTH(day_enrolled) |
+----------+--------------------------+
| Sky | 3 |
| Ben | 20 |
| Travis | 14 |
| Arthur | 1 |
| Benjamin | 1 |
+----------+--------------------------+

To return students who were enrolled before 15th of the month:

SELECT fname, DAYOFMONTH(day_enrolled)
FROM students
WHERE DAYOFMONTH(day_enrolled) < 15;
+----------+--------------------------+
| fname | DAYOFMONTH(day_enrolled) |
+----------+--------------------------+
| Sky | 3 |
| Travis | 14 |
| Arthur | 1 |
| Benjamin | 1 |
+----------+--------------------------+

To return day from a datetime:

SELECT DAYOFMONTH('2020-04-12 06:05:55');
+-----------------------------------+
| DAYOFMONTH('2020-04-12 06:05:55') |
+-----------------------------------+
| 12 |
+-----------------------------------+
robocat
Published by Arthur Yanagisawa
Edited by 0 others
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