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. |
Examples and results:
These examples use the date format DD/MM/YYYY. The date format is specified in the SET DateFormat statement at the top of your load script. Change the format in the examples to suit your requirements.
Example 1:
DayNumberOfYear('12/09/2014')
Returns 256, the day number counted from the first of the year.
Example 2:
DayNumberOfYear('12/09/2014',3)
Returns 196, the number of the day, as counted from 1 March.
Example 3:
Add the example script to your document and run it. Then add, at least, the fields listed in the results column to a sheet in your document 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 |
