Power BI Antipatterns #1: SWITCH(TRUE… in DAX (The Pilot)

Welcome to Power BI Antipatterns, my new blog post series! Over the past few years, as I’ve been working as an independent consultant, I’ve seen many examples of practices in Power BI that were less than optimal. In other words, they weren’t best practices. What’s curious is that sometimes very different people wrote code in the same (bad) way. So I thought I’d like to dissect some of the antipatterns, and I’m starting with the misuse of the SWITCH function in DAX.
Continue reading “Power BI Antipatterns #1: SWITCH(TRUE… in DAX (The Pilot)”

Power Query in dataflows vs. datasets

A few months ago I participated in Q&A in the Sydney Power BI User Group, and one person asked whether we should write our queries in datasets or dataflows. The Q&A format doesn’t allow you to spend too much time on a single question, so in this blog posts I’m providing a more comprehensive comparison of the two options. Continue reading “Power Query in dataflows vs. datasets”

Microsoft Exam Ref DA-100 is now available!

Almost three years ago, my first book, Exam Ref 70-778, was published. Microsoft Exam 70-778 is now phased out, and Microsoft Exam DA-100 replaced it. The new official Power BI exam reference book, Exam Ref DA-100, is now available through Microsoft Press Store, Amazon, and other places! Continue reading “Microsoft Exam Ref DA-100 is now available!”

Single-letter day and month names in Power BI

Occasionally in Power BI, you may want to display day or month names as single letters to save space. This may result in duplicates because neither day nor month names are unique when you shorten them to one letter. In this blog post, I’m showing two solutions to the problem: one in DAX and one in Power Query (M language). Continue reading “Single-letter day and month names in Power BI”

Card drill through in Power BI

Drill through from cards is a common requirement in Power BI reports. While measure drill through has been possible for a while now, drill through from cards has been tricky until recently. In this blog post, I’m showing two ways to configure the card drill through. Continue reading “Card drill through in Power BI”

Working with comma-separated values (CSV) in DAX

There are instances where you get a comma-separated list of keys in each row of a table, and you need to replace it with lookup values. This blog post shows two ways of addressing this situation in DAX. But first, why would you want to do it in DAX? Continue reading “Working with comma-separated values (CSV) in DAX”