Data Model In Power BI

Data Granularity 

Data granularity is the detail that is represented within your data, meaning that the more granularity your data has, the greater the level of detail within your data.

Data Relationships in Power BI

In Power BI we will most of the time work with data models that contain data from multiple tables that must be connected through relationships. Well prepared and thought through tables that are connected by relationships are required between these tables to function together to allow visualizations to be sliced and diced by data from different tables.


Relationships between tables can have three different types of cardinality.

  • Many to One (* :1) – This relationship occurs most often, default type. This means that a column in one table can have one instance of a value and this is your lookup table. The other column may have numerous instances of the value.
  • One to One (1:1) – Both tables relational column has only one instance of a value.
  • Many-to-many relationships(* : *): This relationship configuration comes with a few benefits. As two tables have a many-to-many relationship it removes requirements for unique values in tables.




Conclusion 

In this blog post I have gained a good understanding of data relationships and how to set up relationships, what is data granularity.

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