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

Using Function.InvokeAfter() In Power Query 30 Apr 2015
Last year I blogged about how to introduce a delay between web service requests in M code. Since then a new function has been added to Power Query which makes this a lot easier: Function.InvokeAfter(). This function doesn’t seem to be documented anywhere apart from the Power Query language ...

Analysing SSAS Extended Event Data With Power Query: Part 2, Storage Engine Activity 24 Apr 2015
In part 1 of this series I showed how to use Power Query to extract Extended Event data generated by SSAS. Having done that, I now want to show the first (I hope of many) examples of how this data can be used for performance tuning: analysing activity in the Storage Engine, the part of […]

Power Query Announcements At The PASS BA Conference 21 Apr 2015
There were a couple of big (well, big if you’re a Power Query fan like me) announcements made today by Miguel Llopis at the PASS BA Conference: Today Power Query is available only to people who have Excel Professional Plus or Excel standalone, but as of May a version of Power Query will be ...

Building A Reporting Solution Using Power Query 17 Apr 2015
The video of my SQLBits conference session “Building a reporting solution using Power Query” is now available to view (for free) on the SQLBits website: It’s not your normal Power Query session about self-service ...

Analysing SSAS Extended Event Data With Power Query: Part 1 13 Apr 2015
The other day, while I was reading this post by Melissa Coates, I was reminded of the existence of extended events in SSAS. I say ‘reminded’ because although this is a subject I’ve blogged about before, I have never done anything serious with extended events because you can get the same data from ...