You will need Power BI Desktop and some familiarity with basic operations such as how to create tables, measures, and columns. In addition, it is important that you have some basic data modeling abilities for creating relationships between tables. Finally, you should at least have a rudimentary understanding of DAX as well as some familiarity with the Desktop interface for things such as Sort By columns and formatting options for visuals. All code examples were tested on the latest version of the Power BI Desktop available at the time of writing (February 2020). Older versions of the Power BI Desktop may not have all of the DAX functions used in this book.

If you are using the digital version of this book, we advise you to type the code yourself or access the code via the GitHub repository (the link is in the next section). Doing so will help you avoid any potential errors related to copy/pasting of code.

You can download the example code files for this book from your account at www.packt.com. If you purchased this book elsewhere, you can visit www.packtpub.com/support and register to have the files emailed directly to you.

You can download the code files by following these steps:

1. Log in or register at www.packt.com.
2. Select the Support tab.
3. Click on Code Downloads.
4. Enter the name of the book in the Search box and follow the onscreen instructions.

Once the file is downloaded, please make sure that you unzip or extract the folder using the latest version of:

• WinRAR/7-Zip for Windows
• Zipeg/iZip/UnRarX for Mac
• 7-Zip/PeaZip for Linux

The code bundle for the book is also hosted on GitHub at https://github.com/PacktPublishing/DAX-Cookbook. In case there's an update to the code, it will be updated on the existing GitHub repository.

We also have other code bundles from our rich catalog of books and videos available at https://github.com/PacktPublishing/. Check them out!

We also provide a PDF file that has color images of the screenshots/diagrams used in this book. You can download it here: https://static.packt-cdn.com/downloads/9781839217074_ColorImages.pdf.

There are a number of text conventions used throughout this book.

CodeInText: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: "Mount the downloaded WebStorm-10*.dmg disk image file as another disk in your system."

A block of code is set as follows:

Unix2UTC = 
    VAR __UnixEpoch = 'R03_Table'[UnixTime]
    VAR __Time = DIVIDE(__UnixEpoch, (60*60*24))
    VAR __SourceBaseDate = DATE(1970, 1, 1)
RETURN (__SourceBaseDate + __Time)

Bold: Indicates a new term, an important word, or words that you see onscreen. For example, words in menus or dialog boxes appear in the text like this. Here is an example: "For both visualizations, turn on Data labels and set the Display units to None."