Book Image

DAX Cookbook

By : Greg Deckler
Book Image

DAX Cookbook

By: Greg Deckler

Overview of this book

DAX provides an extra edge by extracting key information from the data that is already present in your model. Filled with examples of practical, real-world calculations geared toward business metrics and key performance indicators, this cookbook features solutions that you can apply for your own business analysis needs. You'll learn to write various DAX expressions and functions to understand how DAX queries work. The book also covers sections on dates, time, and duration to help you deal with working days, time zones, and shifts. You'll then discover how to manipulate text and numbers to create dynamic titles and ranks, and deal with measure totals. Later, you'll explore common business metrics for finance, customers, employees, and projects. The book will also show you how to implement common industry metrics such as days of supply, mean time between failure, order cycle time and overall equipment effectiveness. In the concluding chapters, you'll learn to apply statistical formulas for covariance, kurtosis, and skewness. Finally, you'll explore advanced DAX patterns for interpolation, inverse aggregators, inverse slicers, and even forecasting with a deseasonalized correlation coefficient. By the end of this book, you'll have the skills you need to use DAX's functionality and flexibility in business intelligence and data analytics.
Table of Contents (15 chapters)

Exploiting alternatives to DAX's time intelligence

The problem with DAX's time intelligence functions, other than the fact that they are ill-named, is that, well, they really are not all that intelligent. You see, all of these functions proceed from the same basic assumption that everything works on the basis of a standard calendar year. However, this is not the case for many businesses, including Microsoft! Thus, this underlying assumption of a standard calendar year makes any DAX time intelligence functions dealing with quarters particularly useless. In addition, many of the time intelligence functions are not supported in DirectQuery mode, which, again, makes them entirely useless in such scenarios.

But fear not, as I have mentioned, the vast majority of DAX's time intelligence functions are really not all that intelligent. In fact, they are really simple shorthand...