March 2018
Beginner to intermediate
638 pages
16h 29m
English
Content preview from Mastering Microsoft Power BI
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DAX measures
All analytical expressions ranging from simple sums and averages to custom, complex statistical analyses are implemented within DAX measures. Most measure expressions will reference and aggregate the numeric columns of fact tables, which are hidden from the Report View, as we have seen in per the previous chapter. Additional DAX measures can include filtering conditions which supplement or override any filters applied in Power BI reports, such as the net sales amount for first-year customers only. Measures can also evaluate text columns from dimension tables, such as the count of states or provinces with sales and return text and date values.
Just like the M query language, DAX is a rich, functional language that supports variables ...
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