MySQL WEEKOFYEAR() Function

The MySQL WEEKOFYEAR() function returns week of the year of a given date or datetime value. It can be between 1 to 53.

The WEEKOFYEAR() function returns the same as the WEEK() function with the syntax of WEEK(datetime, 3).

Note: The WEEKOFYEAR() function assumes that the first day of the week is Monday and the first week has more than 3 days.

Syntax

WEEKOFYEAR(datetime)

Parameters

datetime Required. Specify a date or datetime value from which to extract the week of the year.

Return Value

Returns the week of the year of a given date or datetime value.

Example 1:

The example below shows the usage of WEEKOFYEAR() function.

mysql> SELECT WEEKOFYEAR('2018-08-18');
Result: 33

mysql> SELECT WEEKOFYEAR('2018-08-18 10:38:42');
Result: 33

mysql> SELECT WEEKOFYEAR('2018-08-18 10:38:42.000004');
Result: 33

mysql> SELECT WEEKOFYEAR('2014-10-25');
Result: 43

mysql> SELECT WEEKOFYEAR(CURDATE());
Result: 48

Example 2:

Consider a database table called Orders with the following records:

OrderQuantity	Price	OrderTime
100	1.58	2017-08-18 10:38:42
120	1.61	2018-03-23 07:14:16
125	1.78	2018-09-12 05:25:56
50	1.80	2019-01-16 11:52:05
200	1.72	2020-02-06 09:31:34

The statement given below can be used to get the week of the year of records of column OrderTime:

SELECT *, WEEKOFYEAR(OrderTime) AS WEEKOFYEAR_Value FROM Orders;

This will produce the result as shown below:

OrderQuantity	Price	OrderTime	WEEKOFYEAR_Value
100	1.58	2017-08-18 10:38:42	33
120	1.61	2018-03-23 07:14:16	12
125	1.78	2018-09-12 05:25:56	37
50	1.80	2019-01-16 11:52:05	3
200	1.72	2020-02-06 09:31:34	6

❮ MySQL Functions