Definition of fact table in English English dictionary
A table in a star schema that contains facts A fact table typically has two types of columns: those that contain facts and those that are foreign keys to dimension tables The primary key of a fact table is usually a composite key that is made up of all of its foreign keys A fact table might contain either detail level facts or facts that have been aggregated (fact tables that contain aggregated facts are often instead called summary tables) A fact table usually contains facts with the same level of aggregation (See also dimension table )