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daynumberofyear - script and chart function

This function calculates the day number of the year in which a timestamp falls. The calculation is made from the first millisecond of the first day of the year, but the first month can be offset.

Syntax:  

DayNumberOfYear(timestamp[,start_month])

Return data type: integer

Arguments
Argument Description
timestamp The date to evaluate.
start_month By specifying a start_month between 2 and 12 (1, if omitted), the beginning of the year may be moved forward to the first day of any month. For example, if you want to work with a fiscal year starting March 1, specify start_month = 3.

These examples use the date format DD/MM/YYYY. The date format is specified in the SET DateFormat statement at the top of your data load script. Change the format in the examples to suit your requirements.

Function examples
Example Result
DayNumberOfYear( '12/09/2014' ) Returns 256, the day number counted from the first of the year.
DayNumberOfYear( '12/09/2014',3 ) Returns 196, the number of the day, as counted from 1 March.

Example 1 – January start of year (script)

Example 2 – November start of year (script)

Example 3 – January start of year (chart)

Example 4 – November start of year (chart)