What are non-additive facts example?
Sales_Amount is the fact. In this case, Sales_Amount is an additive fact, because you can sum up this fact along any of the three dimensions present in the fact table — date, store, and product. Profit_Margin is a non-additive fact, for it does not make sense to add them up for the account level or the day level.
What is non-additive fact?
A database fact/measure that you should not sum over time or market or product is often called “non-additive”. This is a common database term, not specific to CPG data. Dollar and unit sales are both additive.
What is non-additive measure?
Non-additive measures are measures that cannot be aggregated across any of the dimensions. These measures cannot be logically aggregated between records or fact rows. Non-additive measures are usually the result of ratios or other mathematical calculations.
What is fact table with example?
Thus, the fact table consists of two types of columns. The foreign keys column allows joins with dimension tables, and the measures columns contain the data that is being analyzed. In this example, the customer ID column in the fact table is the foreign key that joins with the dimension table.
Which is an example of a non additive fact?
Example- Consider below fact table of a store: Assume that profit for the day 1 is 70% and for day 2 is 30%, so we can’t say that total profit is 100%. In this case we cannot summed up for any dimensions in the fact table. This is the example of non-additive fact.
Which is an additive fact in a fact table?
The fact/column product sold can be summed up for each level of its dimensions (date, product, store) The product sold is called additive fact because it can be summed up though all of the dimension in the fact table. Non-additive- Non-additive facts are facts that cannot be added for any of the dimensions present in the fact table.
How to calculate a non-additive fact in Excel?
A good approach for non-additive facts is, where possible, to store the fully additive components of the non-additive measure and sum these components into the ﬁnal answer set. Finally, you calculate the ﬁnal non-additive fact.
Are there any measures that are completely non-additive?
Finally, some measures are completely non-additive, such as ratios. A good approach for non-additive facts is, where possible, to store the fully additive components of the non-additive measure and sum these components into the ﬁnal answer set before calculating the ﬁnal non-additive fact.