SQL - MySQL YEARWEEK() Function

August 15, 2024

Categories: MySQL Functions, Reference, SQL Reference

Quick Reference

The MySQL YEARWEEK() function returns the year and week number (a number from 0 to 53) for a given date.

SELECT YEARWEEK('2023-04-15');

Output

YEARWEEK('2023-04-15')
202315

Syntax

YEARWEEK(date, firstdayofweek)

Parameters

Parameter	Description
date	The date or datetime value to extract the year and week number from (required)
firstdayofweek	Specifies what day the week starts on 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

The date or datetime value to extract the year and week number from (required)

firstdayofweek

Specifies what day the week starts on

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

SQL Notes:

Any work being done to modify the structure of a database or delete tables or the the database itself should only be done after making a recent backup

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