MySQL WEEK() Functie

Retourneer het weeknummer voor een datum:

SELECT WEEK("2017-06-15");

Definitie en gebruik

De functie WEEK() retourneert het weeknummer voor een bepaalde datum (een getal van 0 tot 53).

WEEK(date, firstdayofweek)

Parameter	Description
date	Required. The date or datetime to extract the week number form
firstdayofweek	Optional. Specifies what day the week starts on. Can be one of the following: 0 - First day of week is Sunday 1 - First day of week is Monday and the first week of the year has more than 3 days 2 - First day of week is Sunday 3 - First day of week is Monday and the first week of the year has more than 3 days 4 - First day of week is Sunday and the first week of the year has more than 3 days 5 - First day of week is Monday 6 - First day of week is Sunday and the first week of the year has more than 3 days 7 - First day of week is Monday

Parameter

Description

date

Required. The date or datetime to extract the week number form

firstdayofweek

Optional. Specifies what day the week starts on. Can be one of the following:

0 - First day of week is Sunday
1 - First day of week is Monday and the first week of the year has more than 3 days
2 - First day of week is Sunday
3 - First day of week is Monday and the first week of the year has more than 3 days
4 - First day of week is Sunday and the first week of the year has more than 3 days
5 - First day of week is Monday
6 - First day of week is Sunday and the first week of the year has more than 3 days
7 - First day of week is Monday

Werkt in:	Van MySQL 4.0

Retourneer het weeknummer voor een datum:

SELECT WEEK("2017-10-25");

Retourneer het weeknummer voor de huidige systeemdatum:

SELECT WEEK(CURDATE());