Chris Webb

Chris Webb is an independent consultant specialising in Analysis Services, MDX, PowerPivot and DAX. He is the author of "Power Query for Power BI and Excel" and a co-author of "SQL Server Analysis Services 2012: The BISM Tabular Model", "Expert Cube Development with SQL Server 2008 Analysis Services", and "MDX Solutions with Microsoft SQL Server Analysis Services 2005 and Hyperion Essbase". He blogs at

This session will show you how to build aggregations in Analysis Services 2008 that are useful for the queries you're actually running
Learn how the Analysis Services cache works, and how you can pre-load it with data to ensure optimal query performance.
Learn to tune Analysis Services 2008 query performance
This session will introduce the basic concepts of the new multidimensional calculation language, DAX, and show how to implement several common calculations in it
Learn about the most frequently made Analysis Services design mistakes, the problems they cause, and how to fix them or not make them in the first place
This session will introduce the concept of scoped assignments in MDX and show how they can be used to solve various calculation problems.
This session explains what the BI Semantic Model in SQL Server Denali is, how it is related to Analysis Services, and provides a brief introduction to the new Tabular model.
This session will cover advanced security topics in the Analysis Services Multidimensional model.
This session looks at the most significant new functionality to be added to SSAS Multidimensional in recent years: support for the DAX language and Power View.
An in-depth session on advanced Power Query functionality and the M language
A fun session showing some amazing things you can do with Power BI
See how to use Power Query to build a detail-level reporting solution

Blog posts RSS

NaturalInnerJoin And NaturalLeftOuterJoin DAX Functions In Excel 2016 30 Mar 2015
Continuing my series on new DAX functions in Excel 2016, here are two more: NaturalInnerJoin() and NaturalLeftOuterJoin(). Both do pretty much what you’d expect. Consider the following two tables in an Excel worksheet, called ColourFruit and FruitPrice: With these tables loaded into the Excel Data ...

Benford’s Law And Power Query 23 Mar 2015
Probably my favourite session at SQLBits the other week was Professor Mark Whitehorn on exploiting exotic patterns in data. One of the things he talked about was Benford’s Law, something I first heard about several years ago (in fact I’m sure I wrote a blog post on implementing Benford’s Law in MDX ...

ConcatenateX() DAX Function In Excel 2016 19 Mar 2015
This is the first of many posts on the new DAX functions that have appeared in Excel 2016 (for a full list see this post). Today: the ConcatenateX() function. The mdschema_functions schema rowset gives the following description of this function: Evaluates expression for each row on the table, then ...

What’s New In The Excel 2016 Preview For BI? 17 Mar 2015
Following on from my recent post on Power BI and Excel 2016 news, here are some more details about the new BI-related features in the Excel 2016 Preview. Remember that more BI-related features may appear before the release of Excel 2016, and that with Office 365 click-to-run significant new ...

Power BI And Excel 2016 BI News 16 Mar 2015
There have been quite a few Power BI and Office BI-related announcements over the last few weeks, and while I’ve tweeted about them (I’m @Technitrain if you’re not following me already) I though it would be a good idea to summarise them all in one post. Power BI Announcements at Convergence and ...