DAX expression for COUNT of GROUPBY

问题

I am new to PowerBI and writing DAX expressions.

I have a table with a text column with different values.All I want to do is get the count for each distinct value. It's easily achieved with this SQL but I can't get the right DAX expression for it.

select [value],count(*) as TagCount from Tags
group by [value]
order by TagCount desc

Any help?

回答1:

You can do something similar in Power BI as follows:

SUMMARIZE(Tags, Tags[value], "TagCount", COUNT(Tags[value]))

or

SUMMARIZECOLUMNS(Tags[value], "TagCount", COUNT(Tags[value]))

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You can also do this as a matrix visual with Tags[value] for the Rows and the measure COUNT(Tags[value]) for the Values. You can then sort by whichever column you choose by clicking the column heading on the visual.

来源：https://stackoverflow.com/questions/46084978/dax-expression-for-count-of-groupby