You're reading from Extreme DAX

Product typeBook

Published inJan 2022

PublisherPackt

ISBN-139781801078511

Edition1st Edition

Concepts

Business Intelligence

Authors (2):

Michiel Rozema

Henk Vlootman

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Summary

In this chapter, you have learned how to use helper tables to capture user input. Depending on your intended use, a helper table can be as simple as a few rows with options, or a larger list based on other data in the Power BI model. In most cases, helper tables have no relationships with other tables in the model. User input in the form of a selection in a slicer can be captured in DAX measures. The SWITCH function is used to select the appropriate calculation based on the user input.

Keep in mind that when using multiple helper tables for dynamic selections, it is better to use an extended SWITCH statement than to work with nested SWITCH functions. Be aware that nesting can also occur through calling another measure that does its own SWITCH. Piling up dynamic selectors like this can eventually lead to performance issues.

In the next chapter, we dive deeper into calendar-based analysis. While we have used several time-intelligence DAX functions in this chapter, many...

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Extreme DAX

Published in: Jan 2022Publisher: PacktISBN-13: 9781801078511

Authors (2)

Michiel Rozema

Michiel Rozema is one of the world's top Power BI experts, living in the Netherlands. He holds a master's degree in mathematics and has worked in the IT industry for over 25 years as a consultant and manager. Michiel was the data insight lead at Microsoft Netherlands for 8 years, during which time he launched Power BI in the country. He is the author of two Dutch books on Power Pivot and Power BI. Michiel is one of the founders of the Dutch Power BI user group and the organizer of the Power BI Summer School, and has been a speaker at many conferences on Power BI. He has been awarded the Microsoft MVP award since 2019 and, together with fellow MVP Henk Vlootman, runs the consultancy company Quanto, specialists in Power BI.
Read more about Michiel Rozema

Henk Vlootman

Henk Vlootman is a senior global Power Platform, Power BI, and Excel business consultant. Every year since 2013, Henk has received the Microsoft MVP award for his outstanding expertise and community leadership. Henk is one of founders of the Dutch Power BI user group and the organizer of the Power BI Summer School, and has been a speaker at many conferences on Power BI all over the world. He is also the author of two Excel and two Power Pivot / Power BI books. He started his career in 1992 with his own company, then as an Excel consultant. Nowadays he runs the consultancy company Quanto, specialists in Power BI, together with fellow MVP Michiel Rozema.
Read more about Henk Vlootman

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