| http://www.w3.org/ns/prov#value | - f keys.(2) Periodic SnapshotData is a picture of what happened at a moment in time i.e. more rows are added as time passes.(3) Accumulating SnapshotData record is amended over time e.g. for an hourly sales fact, the data record would be updated during the hour real time transactions were occurring.Fact tables have many rows and fewer columns when compared to dimensions.A fact is uniquely identifie
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