Forum Discussion
Is leaf Inquiry
Dear Power BI Representative,
I am reviewing the DAX measure in chapter 11 figure 11-19 in the Definitive Guide to DAX and I do not understand what the PersonsAtParentLevel is trying to do at each personkey.
I do not understand what Persons[ParentKey] = CurrentPersonKey means and how does it equate to 0? You're insight on this measure would be greatly appreciated.
IsLeaf =
VAR CurrentPersonKey = Persons[PersonKey]
VAR PersonsAtParentLevel =
CALCULATE (
COUNTROWS ( Persons ),
ALL ( Persons ),
Persons[ParentKey] = CurrentPersonKey
)
VAR Result = ( PersonsAtParentLevel = 0 )
RETURN
Result
Thank you.
lt79_Pax , I am assuming this a column
This is value in a current row -Persons[PersonKey]
now you are counting does it exists as parent id
CALCULATE (
COUNTROWS ( Persons ),
ALL ( Persons ),
Persons[ParentKey] = CurrentPersonKey
)Then you are checking if count = 0, which mean its does not exists as a parent , so it is a leaf node.
Please provide your feedback comments and advice for new videos
Tutorial Series Dax Vs SQL Direct Query PBI Tips
Appreciate your Kudos.
2 Replies
lt79_Pax , I am assuming this a column
This is value in a current row -Persons[PersonKey]
now you are counting does it exists as parent id
CALCULATE (
COUNTROWS ( Persons ),
ALL ( Persons ),
Persons[ParentKey] = CurrentPersonKey
)Then you are checking if count = 0, which mean its does not exists as a parent , so it is a leaf node.
Please provide your feedback comments and advice for new videos
Tutorial Series Dax Vs SQL Direct Query PBI Tips
Appreciate your Kudos.Thank you amitchandak. You solved my problem.
