Derives the numeric value for the week within the year (
Week 1 of the year is the week that contains January 1.
NOTE: If the source Datetime value does not include a valid input for this function, a missing value is returned.
The current implementation of the WEEKNUM function returns a maximum value of 52. However, in some years, such as 2020, there is a 53rd week. You can add steps similar to the following to work around this issue:
derive type: single value: dateformat(date(year(myDate), 1, 1), 'yyyy\/MM\/dd') as: 'NewYearsDayforMyYear'
derive type: single value: if(datedif(NewYearsDayforMyYear, myDate, day) > (52 * 7), 53, weeknum(myDate)) as: 'weekNumforMyDate'
The above implementation differs from other platforms, such as Microsoft Excel.
Column reference example:
Output: Returns the numeric week number values derived from the
|datetime_col||Y||datetime||Name of column whose week number values are to be computed|
Name of the column whose week number value is to be computed.
Tip: You cannot insert constant Datetime values as inputs to this function. However, you can use the following:
|Required?||Data Type||Example Value|