DAX count for a relationship two tables out

[gavinashton]

I'm jumping straight into my first PowerBI report with something relevant to me! Here's my data:

People table
ID            LocationID
Joe          123
Sally        456
Jackie      123

Location table
ID         Address                     CityID
123       1 Privett Drive           abc
456       2 Mulholland Ave      xyz

City table
ID          Name
abc        London
xyz        Tokyo

What I'd like to do is start with a global heat map of People by City
Then if you zoom into the city that heatmap changes to Locations within that city

So at the core of this is going to be something where we have a count of People associated (via Locations) to City
And then users associated to Locations:

I think this is going to look something like a mapping between People LocationID and Location ID, and then between Location City ID and City ID, following by a little DAX:

Users at Location = (sum(Location(ID);RELATEDTABLE(People)) <- for this I have a mapping between those two attributes.
Users at City = (....  and this is where I get stuck! How do I do the double-hop?

[v-qiuyu-msft · Accepted solution]

Hi @gavinashton,

According to your description, it seems that you want to count people in each city, right?

In your scenario, you can build relationship among those three tables. Then create a measure in City table like this:

CountPeopleInCity = COUNTROWS(People)

Best Regards,
Qiuyun Yu

[gavinashton]

Hi, I need to count cities and locations (zooming into the map you get cities at global scale then locations at a deeper level). But this looks like a good option, I'll try it out 🙂

[v-qiuyu-msft]

Hi @gavinashton,

Is our suggestion helpful for you? If that is a case, would you please mark a helpful reply as an answer to close the thread?

Best Regards,
Qiuyun Yu

[CahabaData]

Make join lines between the tables.  Then the Related function should offer those tables/fields as part of Intellisense.