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WEEK() - Week of Year
How to calculate the week of year from a given date using the WEEK() function?
✍: FYIcenter.com
WEEK(date, mode) is a MySQL built-in function that
returns the week of year from a given date.
For example:
SELECT WEEK('2023-02-03'), WEEK(NOW()), NOW();
-- +--------------------+-------------+---------------------+
-- | WEEK('2023-02-03') | WEEK(NOW()) | NOW() |
-- +--------------------+-------------+---------------------+
-- | 5 | 46 | 2023-11-16 07:20:11 |
-- +--------------------+-------------+---------------------+
SELECT WEEK('2024-03-04'), WEEK('2024-03-04', 0);
-- +--------------------+-----------------------+
-- | WEEK('2024-03-04') | WEEK('2024-03-04', 0) |
-- +--------------------+-----------------------+
-- | 9 | 9 |
-- +--------------------+-----------------------+
SELECT WEEK('2024-03-04', 0), WEEK('2024-03-04', 1), DAYOFWEEK('2024-01-01');
-- +-----------------------+-----------------------+-------------------------+
-- | WEEK('2024-03-04', 0) | WEEK('2024-03-04', 1) | DAYOFWEEK('2024-01-01') |
-- +-----------------------+-----------------------+-------------------------+
-- | 9 | 10 | 2 |
-- +-----------------------+-----------------------+-------------------------+
Reference information of the WEEK() function:
WEEK(date, mode): int
Returns the week number for date. The two-argument form of WEEK()
enables you to specify whether the week starts on Sunday or Monday and
whether the return value should be in the range from 0 to 53 or from 1
to 53. If the mode argument is omitted, the value of the
default_week_format system variable is used.
Arguments, return value and availability:
date: Required. The date to extract the week of year from.
mode: Optional. Default is 0. The week mode to control how the first week
is defined.
int: Return value. The week of year.
Available since MySQL 4.
Week modes:
Mode 1st day of week Range Week 1 is the first week
---- --------------- ----- ------------------------
0 Sunday 0-53 with a Sunday in this year
1 Monday 0-53 with 4 or more days this year
2 Sunday 1-53 with a Sunday in this year
3 Monday 1-53 with 4 or more days this year
4 Sunday 0-53 with 4 or more days this year
5 Monday 0-53 with a Monday in this year
6 Sunday 1-53 with 4 or more days this year
7 Monday 1-53 with a Monday in this year
Related MySQL functions:
⇒ WEEKDAY() - Weekday (0=Monday)
⇐ UTC_TIMESTAMP() - Current UTC Timestamp
2023-11-17, 1411🔥, 0💬
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