definition of level of granularity
Granularity is the level of depth represented by the data in a fact or dimension table in a data warehouse. High granularity means a minute, sometimes atomic grade of detail, often at the level of the transaction. Low granularity zooms out into a summary view of data and transactions. https://en.wikipedia.org/wiki/Granularity#Data_granularity http://www.information-management.com/news/5460-1.html.