How does the COUNTX function (DAX) work?
The COUNTX function (DAX) counts the number of rows that contain a non-blank value or an expression that evaluates to a non-blank value, when evaluating an expression over a table.
COUNTX Formula Syntax
How do you use the COUNTX function?
The COUNTX function is used to count only number values, dates, or strings.
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Considerations when using the function
The COUNTX function takes two arguments. The first argument must always be a table, or any expression that returns a table. The second argument is the column or expression that is searched by COUNTX.
If the function finds no rows to count, it returns a blank.
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Formula examples using the COUNTX function
= COUNTX (RELATEDTABLE (East_Sales), IF ([Product] = East_Sales[Product],1,0))