In data cube each cell contains one or several values called measures or metrics. It helps to analyse aggregated facts and the level of detail is directly proportional to number of dimensions in the cube. Here axes represents dimension and the space represents facts (Wang et al., 2005). Above shown figure of data cube contains three dimensions namely Time, Geography and Product. Each cell consists of (T, P, G) and business measure is the total sales. Here the amount of product P along with total sales sold in geography G in time period T is stored. Figure 2 shows hierarchy of dimensions.