How to convert a SQL IN statement to DAX query

venkb , Try 

measure =
var _tab = summarize(filter(A, [date]= date(2020,11,05) && [State] ="Step2" && [Status] = "Status" ), A[FileName])
return
calculate(countrows(A) , filter(A , [FileName] in _tab && [State] ="Step2" && [Status] = "Status" ))

Or a table as 

Table =
var _tab = summarize(filter(A, [date]= date(2020,11,05) && [State] ="Step2" && [Status] = "Status" ), A[FileName])
return
calculatetable(A, filter(A , [FileName] in _tab && [State] ="Step2" && [Status] = "Status" ))

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Hi venkb ,

Since you want to pass slicer value into your DAX expression, it is needed to create a measure like below and put it into visual filter field.

Measure =
VAR FileName =
    SUMMARIZE (
        FILTER (
            ALLSELECTED ( A ),
            A[Date] = SELECTEDVALUE ( SlicerTable[Date] )
                && A[State] = "Step2"
                && A[Status] = "Success"
        ),
        [FileName]
    )
VAR Result =
    IF (
         (
            MAX ( A[Date] ) = SELECTEDVALUE ( SlicerTable[Date] )
                || MAX ( A[Date] )
                    = SELECTEDVALUE ( SlicerTable[Date] ) + 1
        )
            && MAX ( A[State] ) = "Step1"
            && MAX ( A[Status] ) = "Success"
            && MAX ( A[FileName] ) IN FileName,
        1
    )
RETURN
    Result

Best regards

Icey

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