Elemental MDX: MDX Time Series Functions: ClosingPeriod(), LastPeriods() and ParallelPeriod(), Pt. 1 In this three-part article, we will introduce the ClosingPeriod(), LastPeriods() and ParallelPeriod() time series functions, continuing our recent forays into functions that we can exploit to perform analysis within the context of time. This article follows an examination of a couple of other such time series functions in...