weekstart - script and chart function

This function returns a value corresponding to a timestamp of the first millisecond of the first day (Monday) of the calendar week containing date. The default output format is the DateFormat set in the script.

Syntax:  

WeekStart(date [, period_no[, first_week_day]])

Return data type: dual

Arguments:  

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 data load script. Change the format in the examples to suit your requirements.

Scripting examples

Example	Result
weekstart('12/01/2013')	Returns 07/01/2013.
weekstart('12/01/2013', -1 )	Returns 31/11/2012.
weekstart('12/01/2013', 0, 1)	Returns 08/01/2013.

Example:  

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

This example finds the first day of the week following the week of each invoice date in the table.

TempTable:

LOAD RecNo() as InvID, * Inline [

InvDate

28/03/2012

10/12/2012

5/2/2013

31/3/2013

19/5/2013

15/9/2013

11/12/2013

2/3/2014

14/5/2014

13/6/2014

7/7/2014

4/8/2014

];

 

InvoiceData:

LOAD *,

WeekStart(InvDate, 1) AS WkStart

Resident TempTable;

Drop table TempTable;

The resulting table contains the original dates and a column with the return value of the weekstart() function. You can display the full timestamp by specifying the formatting in the properties panel.