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MySQL | LAST_DAY method

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schedule Jul 1, 2022
Last updated
local_offer MySQL
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MySQL's LAST_DAY(~) method returns the last day of the month for the provided date / datetime.

Parameters

1. date | date|datetime

A date to return the last day of the month for.

Return value

The last day of the month 'YYYY-MM-DD' for the input 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 return last day of the month for each student's enrollment date:

SELECT fname, LAST_DAY(day_enrolled)
FROM students;
+----------+------------------------+
| fname | LAST_DAY(day_enrolled) |
+----------+------------------------+
| Sky | 2015-12-31 |
| Ben | 2016-04-30 |
| Travis | 2018-08-31 |
| Arthur | 2016-04-30 |
| Benjamin | 2014-01-31 |
+----------+------------------------+

Invalid date input

If the argument is not a valid date, NULL is returned:

SELECT LAST_DAY('2020-04-31');
+------------------------+
| LAST_DAY('2020-04-31') |
+------------------------+
| NULL |
+------------------------+

The date input is invalid as April only has 30 days.

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Published by Arthur Yanagisawa
Edited by 0 others
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