Forum Discussion
Hierarchy Modelling - Many to Many relationships
In my operational database, the tables are structured in such a way that each object has its own ID and the relationship between objects are stored in another tabes called as relation tabe.
Essentially, the relation table contained a parent child relationship. I added an extra column in it called as PATH, that I can use to traverse through the relations.
So the tables are City, State, Country and Continent.
City:
State
Country
Continent:
Most Important is this table which shows the path
table_REL
Question : What is the best way to model this kind of structure in Power BI?
The below obviously doesnt work the best.
Shall I make a bridge table and then link the Table_Rel to each dimension? Has anyone come across such modelling ?
1 Reply
Hi Sachy123 ,
The bridging table approach is considered the best practice when relating two dimensions.
Many-to-many relationship guidanceYou can rebuild the metadata of the table in PQ to create a snowflake model:
Continent(1)(Continent_ID) --> (*)Country(1)(Country_ID) --> (*)State(1)(State_ID) -->(*)City
Understand star schema and the importance for Power BI
Parsing Organizational Hierarchy or Chart of Accounts in Power BI with Parent-child Functions in DAX
Best Regards,
Gao
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