Forum Discussion
Relationships in data model does not work - breaks table visual
Hi,
I have a pretty simple data model, which consists of 3 tables:
* property table
* measures table (one property can have multiple measures)
* installation works (one property can have multiple installation works)
When I try to create a table visual which is including data from all 3 tables I get the below message:
Not quite sure what the problem is in the data model.
I have tried having the data model with cross-filter direction = single, but that doesn't help.
Do I need some form of a 'bridge' table to link all 3 tables in order to show data in one visual?
What is the best approach here?
Thanks,
Maria
Hi mtomova ,
I wanted to check if you have had an opportunity to try the bridge table approach.
8 Replies
Best practice: Keep star schema → use property_table as dimension, and show measures/installation separately.
If you need both in one row → create a bridge table (property_id, measure_id, task_id).
If you just need to show related fields → use DAX (LOOKUPVALUE / TREATAS).
Hi, thank you, I thought that the 'bridge' table is the proper approach if we want to combine the data.
I have never done it before, but will give it a try and see how to relate the tables.
As for the LOOKUPVALUE, wouldn;t that throw an error, because I will return multiple match per property_id?Hi mtomova ,
I wanted to check if you have had an opportunity to try the bridge table approach.
Hi, I have tried that:
and it does not resolved the error.
Thanks,
Maria
The issue is because both child tables link to property_table, creating a many-to-many path
