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SQLBI - Marco Russo

SQLBI is a blog dedicated to building Business Intelligence solutions with SQL Server.
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Slowly Changing Dimensions handling in PowerPivot (and BISM?)

During the PowerPivot Workshop in London we received many interesting questions and Alberto had the inspiration to write this nice post about Slowly Changing Dimensions handling in PowerPivot. It is interesting the consideration about SCD Type I attributes in a SCD Type II dimension – you can probably generate them in a more dynamic way in PowerPivot (thanks to Vertipaq and DAX) instead of relying on a relational table containing all the data you need, which usually requires a more complex ETL process. This is particularly interesting for the next version of Analysis Services and it might impact the way we will design Data Marts for BISM Models in Analysis Services.

Published Thursday, February 10, 2011 4:06 PM by Marco Russo (SQLBI)
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Stan said:

how would you do the same thing in mdx?

February 12, 2011 11:22 PM

Marco Russo (SQLBI) said:

In MDX you cannot use the same technique, and you would have slower performance in any case. This is a specific advantage of DAX and Vertipaq. Please note that you don't have the concept of "Calculated Column" in MDX, this is a big difference.


February 13, 2011 10:57 AM

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About Marco Russo (SQLBI)

Marco Russo is a consultant, writer and trainer specialized in Business Intelligence with Microsoft technologies. He runs the SQLBI.COM website, which is dedicated to distribute resources useful for BI developers, like Integration Services components, Analysis Services models, tools, technical information and so on. Marco is certified as MCT, MCDBA, MCSD.NET, MCSA, MCSE+I.

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