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Grouping by

One of the necessities to master while performing even simple data analysis is to carry out the calculation on specific group, i.e. #Groupby

In Power BI, such is done by functions ALLEXCEPT and CALCULATE. Here is an example. Let´s say we want to calculate the number of people within different departments of the company in different time spans. The simple formula for that is as follows:

Count_people = CALCULATE(DISTINCTCOUNT(Report[employee_number]);ALLEXCEPT(Report;Report[Days];Report[Departments]))


Combination of CALCULATE and DISTINCTCOUNT calculates the number, ALLEXCEPT specifies by which groups. Straightforward, right?