periodOverPeriodDifference

The periodOverPeriodDifference function calculates the difference of a measure over two different time periods as specified by period granularity and offset. Unlike a difference calculation, this function uses a date-based offset instead of a fixed sized offset. This ensures that only the correct dates are compared, even if data points are missing in the dataset.

Syntax

periodOverPeriodDifference(
	measure, 
	date, 
	period, 
	offset)

Arguments

measure

An aggregated measure that you want to perform the periodOverPeriod calculation on.

dateTime

The Date dimension over which we are computing Period-Over-Period calculations.

period

(Optional) The time period across which you're computing the computation. Granularity of YEAR means YearToDate computation, Quarter means QuarterToDate, and so on. Valid granularities include YEAR, QUARTER, MONTH, WEEK, DAY, HOUR, MINUTE, and SECONDS.

The defaults value is the visual date dimension granularity.

offset

(Optional) The offset can be a positive or negative integer representing the prior time period (specified by period) that you want to compare against. For instance, period of a quarter with offset 1 means comparing against the previous quarter.

The default value is 1.

Example

The following example calculates the month over month difference in sales with the visual dimension granularity and default offset of 1.

periodOverPeriodDifference(sum(Sales), {Order Date})

The following example calculates the month over month difference in sales with a fixed granularity of MONTH and fixed offset of 1.

periodOverPeriodDifference(sum(Sales),{Order Date}, MONTH, 1)