DAX query for distinct count with mutiple filters

[Anonymous]

I have two tables 'locations' and 'markets', where, a many to many relationship exists between these two tables on the column 'market_id'. A report level filter has been applied on the column 'entity' from 'locations' table. Now, I'm supposed to distinctly count the 'location_id' from 'markets' table where 'active=TRUE'. How can I write a DAX query such that the distinct count of location_id dynamically changes with respect to the selection made in the report level filter?

Below is an example of the tables:

locations:

location_id	market_id	entity	active
1	10	nyc	true
2	20	alaska	true
2	20	alaska	true
2	30	miami	false
3	40	dallas	true

markets:

location_id	market_id	active
2	20	true
2	20	true
5	20	true
6	20	false

[Thejeswar]

Hi @Anonymous ,

After performing many-to-many join using bridge table, you can use the below DAX measure to achieve what you want

Measure = 
CALCULATE(DISTINCTCOUNT(markets[location_id]), markets[active] = "True")

For explaining, I added some more data to those tables.

Below screenshots shows the usages

Example 1:

Note although there are 3 location under marketid = 20, since only two of them have active status as True, the table shows 2 as the output. It is also filtered by entity

Example 2: When miami selected, where active is False in markets table, the output does not show anything

 Hope this helps!!

If this is what you need, mark it as solution and don't hesitate to appreciate with kudos!!!

[az38]

@Anonymous 

Not sure I understand you correct but try a measure like

Measure = 
CALCULATE(DISTINCTCOUNT(markets[location_id]), markets[active]=true(), treatas(VALUES(locations[location_id]), markets[location_id]))

[Anonymous]

Hi @az38! If I understood Treatas properly, what it does is that whatever filter is applied to 'locations[location_id]', the same filter gets applied to markets[location_id]. However, I think I'm looking for a different solution. Basically a report level filter is applied on the column 'locations[entity]' and whichever value is selected in the entity, I should get the distinct count of location_id after connecting the two tables 'locations' and 'markets' on many to many relationship. Could you please help me with this?

[amitchandak]

@Anonymous , First you use a bridge table

https://www.seerinteractive.com/blog/join-many-many-power-bi/

Try treatas

https://docs.microsoft.com/en-us/dax/treatas-function

https://www.sqlbi.com/articles/propagate-filters-using-treatas-in-dax/

[Anonymous]

Hi @amitchandak! If I understood Treatas properly, what it does is that whatever filter is applied to 'locations[location_id]', the same filter gets applied to markets[location_id]. However, I think I'm looking for a different solution. Basically a report level filter is applied on the column 'locations[entity]' and whichever value is selected in the entity, I should get the distinct count of location_id after connecting the two tables 'locations' and 'markets' on many to many relationship.. Could you please help me with this?