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Distinct Counts in Power Query

Reza Rad shows how you can get a distinct count in Power Query:

You can have a distinct count calculation in multiple places in Power BI, through DAX code, using the Visual’s aggregation on a field, or even in Power Query. If you are doing the distinct count in Power Query as part of a group by operation, however, the existing distinct count is for all columns in the table, not for a particular column. In this article, I’ll show you a method you can use to get the distinct count of a particular column through the Group By transformation in Power Query component of Power BI.

Click through to learn how.