March 2018
Beginner to intermediate
638 pages
16h 29m
English
Content preview from Mastering Microsoft Power BI
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Measure support logic
The purpose of the Measure Support table is to centralize DAX expressions that can be reused by other measures. Since DAX variables are limited to the scope of individual measures, a set of hidden, intermediate measures avoids the need to declare variables for each measure. The intermediate, or branching, DAX measure expressions also make it easy and less error-prone to implement a change as all dependent DAX measures will be updated automatically. In this way, the Measure Support table serves a similar function to the parameter and staging query expressions, described in the previous chapter, for M Queries.
For this dataset, DAX expressions containing the ISFILTERED() and ISCROSSFILTERED() functions can be used to determine ...
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