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inweektodate - script and chart function

This function returns True if timestamp lies inside the part of week containing base_date up until and including the last millisecond of base_date.


InWeekToDate (timestamp, base_date, period_no [, first_week_day])

Return data type: Boolean


InWeekToDate arguments
Argument Description
timestamp The date that you want to compare with base_date.
base_date Date that is used to evaluate the week.
period_no The week can be offset by period_no. period_no is an integer, where the value 0 indicates the week which contains base_date. Negative values in period_no indicate preceding weeks and positive values indicate succeeding weeks.

By default, the first day of the week is Monday,starting at midnight between Sunday and Monday. To indicate the week starting on another day, specify an offset in first_week_day. This may be given as a whole number of days and/or fractions of a day.

Example 1:  

inweektodate ('12/01/2006', '12/01/2006', 0)

Returns True

Example 2:  

inweektodate ('12/01/2006', '11/01/2006', 0)

Returns False

Example 3:  

inweektodate ('12/01/2006', '18/01/2006', -1)

Returns False
Because period_no is specified as -1, the effective data that timestamp is measured against is 11/01/2006.

Example 4:  

inweektodate ( '11/01/2006', '12/01/2006', 0, 3 )

Returns False
Because first_week_day is specified as 3 (Thursday), which makes 12/01/2006 the first day of the week following the week containing 12/01/2006.

Example 5:  

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.

This example checks if an invoice date falls during the fourth week after the week in base_date, by specifying period_no as 4, but before the value of base_date.


LOAD RecNo() as InvID, * Inline [


















InWeekToDate(InvDate, '11/01/2013', 4) AS InWeek2DPlus4

Resident TempTable;

Drop table TempTable;

The resulting table contains the original dates and a column with the return value of the inweek() function.

Example 5 results
InvDate InWeek2DPlus4
28/03/2012 0 (False)
10/12/2012 0 (False)
5/2/2013 -1 (True)
31/3/2013 0 (False)
19/5/2013 0 (False)
15/9/2013 0 (False)
11/12/2013 0 (False)
2/3/2014 0 (False)
14/5/2014 0 (False)
13/6/2014 0 (False)
7/7/2014 0 (False)
4/8/2014 0 (False)

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