September 2025
Beginner to intermediate
594 pages
11h 17m
English
Content preview from DAX for Humans
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3
Dates and Calendars
In just the first two chapters, you are already familiar with the majority of the functions that you will find useful when writing DAX. You will use those basic DAX functions as we explore more complex scenarios and calculations. However, an additional core area remains to be explored, and that subject is dates and calendars.
Dates and calendars are fundamental to nearly all Power BI semantic models. Being so fundamental, it should be no surprise that DAX has over 30 so called “time intelligence” functions designed to make complex date calculations “easy”. Unfortunately, DAX’s “time intelligence” functions are fundamentally flawed for a variety of reasons that will be made clear in this chapter. Instead, the No CALCULATE ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.