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What is semi additive measures examples?
Semi additive measures are measures that have a different way of aggregation over time (or other specific dimensions). For example, thinking of stock values you want to sum them up by product, location, country etc. but not by time (here you may want to see the last value, the average, the minimum/maximum or whatever).
What are semi additive measures?
A semi-additive measure is one that is to be summed for some dimensions, but should not be summed across some other dimensions. For the dimensions over which the measure is not additive, a different aggregation rule must be specified.
Can a semi additive fact be added across all dimensions?
Semi-additive measures can be summed across some dimensions, but not all; balance amounts are common semi-additive facts because they are additive across all dimensions except time. Finally, some measures are completely non-additive, such as ratios.
What are semi additive facts examples?
Semi-additive facts are facts that can be summed up for some of the dimensions in the fact table, but not the others. For example if you have the number of items in the warehouse for each day, you can sum up the items for each day (total warehouse of the day), but it make no senso to sum up in the year.
Is time a semi additive fact?
Semi-additive calculations are the hardest ones: a semi-additive measure uses SUM to aggregate over some dimensions and a different aggregation over other dimensions – a typical example being time.
What are different types of dimension table?
Types of Dimension Table
- SCD (Slowly Changing Dimensions) The dimension attributes that tend to change slowly with time rather than changing in a regular interval of time are called slowly changing dimensions.
- Conformed Dimension.
- Junk Dimension.
- Degenerate Dimension.
- Roleplay Dimension.
Which is an example of a semi additive measure?
Semi-additive calculations are the hardest ones: a semi-additive measure uses SUM to aggregate over some dimensions and a different aggregation over other dimensions – a typical example being time. As an example, we use a model that contains the balance of current accounts.
Are there any semi additive measures in Dax?
Similar to LASTDATE, there is a rich set of predefined functions in DAX. For example, LASTNONBLANK is an iterator that performs a calculation similar to the ones we have shown, although it is typically slower than searching for the max date in the fact table. This is the reason we did not cover it in this article.
How to do semi additive calculations in SQL?
To solve semi-additive calculations, you can use the LASTDATE function which comes with a strong limitation: it only searches in the date table because it fails to find the most desirable outcome, which is the last date with transactions.
Which is an additive measure in a fact table?
The numeric value in a fact table that is more flexible is an additive measure. For each dimension you can even sum up. If you want to know the total sales of your company you can easily sum up all the sales.