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MySQL | DAYOFYEAR method

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Date and Time
schedule Jul 1, 2022
Last updated
local_offer MySQL
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MySQL's DAYOFYEAR(~) method returns the day of the year (1-366) of a given date or datetime.

Parameters

1. date | date/datetime

The date/datetime to retrieve the day of year from.

Return value

The day of the year (1-366) 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 of year that current students enrolled:

SELECT fname, DAYOFYEAR(day_enrolled)
FROM students;
+----------+-------------------------+
| fname | DAYOFYEAR(day_enrolled) |
+----------+-------------------------+
| Sky | 337 |
| Ben | 111 |
| Travis | 226 |
| Arthur | 92 |
| Benjamin | 1 |
+----------+-------------------------+

To return students who were enrolled before 200th day of the year:

SELECT fname, DAYOFYEAR(day_enrolled)
FROM students
WHERE DAYOFYEAR(day_enrolled) < 200;
+----------+-------------------------+
| fname | DAYOFYEAR(day_enrolled) |
+----------+-------------------------+
| Ben | 111 |
| Arthur | 92 |
| Benjamin | 1 |
+----------+-------------------------+

To return day of year from a datetime:

SELECT DAYOFYEAR('2020-04-12 06:05:55');
+----------------------------------+
| DAYOFYEAR('2020-04-12-06-05-55') |
+----------------------------------+
| 103 |
+----------------------------------+

We now know that 12 April 2020 was the 103rd day in 2020.

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Published by Arthur Yanagisawa
Edited by 0 others
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