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MONTH_WEEK.rst

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MONTHWEEK scalar function

Returns the week of the month that ADATE exists within (weeks start on a Sunday, result will be in the range 1-6).

Prototypes

MONTHWEEK(ADATE DATE)
MONTHWEEK(ADATE TIMESTAMP)
MONTHWEEK(ADATE VARCHAR(26))

RETURNS SMALLINT

Description

Returns the week of the month of ADATE, where weeks start on a Sunday. The result will be in the range 1-6 as partial weeks are permitted. For example, if the first day of a month is a Saturday, it will be counted as week 1, which lasts one day. The next day, Sunday, will start week 2.

Parameters

ADATE
The date to calculate the week of the month for.

Examples

Calculate the week of the month for the 31st of January, 2010:

VALUES MONTHWEEK(DATE(2010, 1, 31));
1
------
     6

Calculate the length of all weeks in January 2010:

SELECT MONTHWEEK(D) AS WEEK_NUM, COUNT(*) AS WEEK_LENGTH
FROM TABLE(DATE_RANGE(MONTHSTART(2010, 1), MONTHEND(2010, 1)))
GROUP BY MONTHWEEK(D);
WEEK_NUM WEEK_LENGTH
-------- -----------
       1           2
       2           7
       3           7
       4           7
       5           7
       6           1

See Also