SQL Reference
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Quick Reference

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

SELECT WEEK('2023-06-15');

Output

WEEK('2023-06-15')
24

Syntax

WEEK(date, firstdayofweek)

Parameters

ParameterDescription
dateThe date or datetime to extract the week number from (required)
firstdayofweekSpecifies 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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