Power BI: Choosing Between Default Or Custom Date Dimensions

Reza Rad looks at the default date dimension available in Power BI and compares it to what you can build yourself:

Oh yes! Of course like any other table structures in the Power BI in-memory based structure, every date table, consumes memory. But it would do the same even if you create your custom date dimension! Whenever you do the role-playing dimension scenario you are also consuming even more memory! The main difference is that Power BI default Date dimension will be created even if you do not want to do the date-based analysis on a date field! For example, even if you don’t use DueDate in your date-based analysis, still Power BI creates a date dimension for it. You cannot stop it for one field. You have to either stop the default creation of the Date dimension for the entire model or use it for the entire model, you cannot customize it per field. But with the custom date dimension, you can.

Reza does a good job of giving us the trade-offs between these two and explaining when we should use each.

Related Posts

Showing Forecasts With Actuals In Power BI

Alberto Ferrari shows us how we can incorporate actuals and forecasted values in the same Power BI visuals: The Forecast measure in the demo model is quite an advanced piece of DAX code that would require a full article by itself. The curious reader will find more information on how to reallocate budget at different […]

Read More

Automated Testing With Power Query

Fred Kaffenberger walks us through query failure with Power Query: I loved Nar’s post on Automated Testing using DAX. I especially like the rule of always including controls so that business readers can share responsibility for data quality. For my part, I sometimes use hidden pages in Power BI reports to assure myself of data quality. I […]

Read More

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Categories

October 2018
MTWTFSS
« Sep Nov »
1234567
891011121314
15161718192021
22232425262728
293031