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

The function always uses years based on 366 days.

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.

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.

Add the example script to your app and run it. Then add, at least, the fields listed in the results column to a sheet in your app to see the result.

ProjectTable:

LOAD recno() as InvID, * INLINE [

StartDate

28/03/2014

10/12/2014

5/2/2015

31/3/2015

19/5/2015

15/9/2015

] ;

NrDays:

Load *,

DayNumberOfYear(StartDate,4) As DayNrYear

Resident ProjectTable;

Drop table ProjectTable;

The resulting table shows the returned values of DayNumberOfYear for each of the records in the table.

InvID	StartDate	DayNrYear
1	28/03/2014	363
2	10/12/2014	254
3	5/2/2015	311
4	31/3/2015	366
5	19/5/2015	49
6	15/9/2015	168

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