What are Types of Facts

What are Types of Facts?

·         Additive: Additive facts are facts that can be summed up through all of the dimensions in the fact table. A sales fact is a good example for additive fact.

·         Semi-Additive: Semi-additive facts are facts that can be summed up for some of the dimensions in the fact table, but not the others. 

       Eg: Daily balances fact can be summed up through the customers dimension but not through the time dimension.

·         Non-Additive: Non-additive facts are facts that cannot be summed up for any of the dimensions present in the fact table. 

       Eg: Facts which have percentages, ratios calculated.