Power BI compare row by itself (previous row)

Question

I am new to Dax in Power BI. I have a table that have columns:

"elment_id", "version_Id", "type_name", "type_sorting", "workSet" AND expected result is the output result from the Dax query.

I am trying to compare version_Id (x2, x2) with version_Id (x1, x1) (previous) if any change happened.

in another word, I am inserting to SQL database objects have always the same "elment_id", "type_name" but the "type_sorting", "workSet" sometimes will be updated based on "version_Id",

elment_id	version_Id	type_name	type_sorting	workSet	expected result
01	x1	Round Duct	0	w
02	x1	Round Duct	0	m
01	x2	Round Duct	1	y	True
02	x2	Round Duct	0	m	False

Answer 1

Try with measure, where you should manipulate FILTER part. First we check condition that must by equal (elementID/Type, and version = prev_version), then we add as many or " || " to check if one of them is not equal:

Check =
VAR cc =
    MAX (
        CALCULATE (
            COUNTROWS ( changeCheck ),
            FILTER (
                ALL ( changeCheck ),
                (
                    SELECTEDVALUE ( changeCheck[elementID] ) = changeCheck[elementID]
                        && SELECTEDVALUE ( changeCheck[versionId] ) - 1 = changeCheck[versionId]
                        && SELECTEDVALUE ( changeCheck[Type] ) = changeCheck[Type]
                )
                    && (
                        IF (
                            ISBLANK ( SELECTEDVALUE ( changeCheck[Type_Sort] ) ),
                            "NullVal",
                            SELECTEDVALUE ( changeCheck[Type_Sort] )
                        )
                            <> IF ( ISBLANK ( changeCheck[Type_Sort] ), "NullVal", changeCheck[Type_Sort] )
                            || SELECTEDVALUE ( changeCheck[Workset] ) <> changeCheck[Workset]
                    )
            )
        ),
        0
    )
RETURN
    cc