What does level of Granularity of a fact table signify?
Granularity The first step in designing a fact table is to determine the granularity of the fact table. By granularity, we mean the lowest level of information that will be stored in the fact table. This constitutes two steps: Determine which dimensions will be included. Determine where along the hierarchy of each dimension the information will be kept. The determining factors usually goes back to the requirements