Can relationships be defined while using a live connection in Power BI?

Can relationships be defined while using a live connection in Power BI?

• A. Yes, easily
• B. No, it is not possible
• C. Only for certain data sources
• D. Yes, but they must be pre-defined

Answer: (B)

In the context of Power BI, when working with a live connection to certain data sources, such as SQL Server Analysis Services (SSAS) or other semantic data models, you cannot create relationships directly within Power BI. The relationships must already be defined within the underlying data model or database. This means that the structural constraints and relationships are established in the data source itself, and Power BI simply reads this schema. The nature of a live connection is such that it operates based on the predispositions of the data source. Thus, any modifications to relationships or data structures must occur at the source level, and not within Power BI. This characteristic distinguishes live connections from imported models where users can create and manipulate relationships directly within Power BI's interface. This understanding highlights the core limitation with live connections in relation to relationships, emphasizing the need for prior definition in the underlying data source to facilitate effective data usage within Power BI.

In the context of Power BI, when working with a live connection to certain data sources, such as SQL Server Analysis Services (SSAS) or other semantic data models, you cannot create relationships directly within Power BI. The relationships must already be defined within the underlying data model or database. This means that the structural constraints and relationships are established in the data source itself, and Power BI simply reads this schema.

The nature of a live connection is such that it operates based on the predispositions of the data source. Thus, any modifications to relationships or data structures must occur at the source level, and not within Power BI. This characteristic distinguishes live connections from imported models where users can create and manipulate relationships directly within Power BI's interface.

This understanding highlights the core limitation with live connections in relation to relationships, emphasizing the need for prior definition in the underlying data source to facilitate effective data usage within Power BI.