GetFirstDay

The MDX GetFirstDay function for Essbase returns, for a given date_part, the first day of the time interval for the input date, following a standard Gregorian calendar.

Syntax

GetFirstDay ( date, date_part )

Parameters

date

A number representing the input date between January 1, 1970 and Dec 31, 2037. The number is the number of seconds elapsed since midnight, January 1, 1970. To retrieve this number, use any of the following functions: Today(), TodateEx(), GetFirstDate(), GetLastDate(), DateRoll().

Date-Time type attribute properties of a member can also be used to retrieve this number. For example: Product.currentmember.[Intro Date] returns the Introduction or release date for the current product in context. [Cola].[Intro Date] returns the Introduction or release date for the “Cola” product.

date_part

Defined time components of the standard calendar.

  • DP_YEAR - year of the input date.

  • DP_QUARTER – quarter of the input date.

  • DP_MONTH - month of the input date.

  • DP_WEEK - week of the input date.

Notes

This function can be used for getting the truncated date of an input date for a given date part, following a standard Gregorian calendar.

Example

Assuming today’s date is April 15 2007, consider the following scenarios.

GetFirstDay(Today(), DP_YEAR)

returns the first day of the year, Jan 1 2007

GetFirstDay(Today(), DP_QUARTER)

returns the first day of the quarter, Apr 1 2007

GetFirstDay(Today(), DP_MONTH)

returns the first day of the month, Apr 1 2007

GetFirstDay(Today(), DP_WEEK)

returns the first day of the week, Apr 15 2007