power bi report based on multiple semantic models

Hi , powerbiexpert22 , Yes you can bring in 2 or more semantic model as source and create a report on top of it .
When you connect to the first semantic model (A) it will be in Live mode . You can see it at the bottom of the desktop .



When you bring in the second model (B) by using the get data option pbi will provide a prompt asking it need to change the connection from live to Direct Query and asking for the user input to add the local model

once you select add a local model you can select the required tables you want to retain from model A 

Choose the second model B and bring in the required tables 

now you can create relationships between tables and use it as a single model .

But the keep in account of the constrains it brings RLS from both models and the users needs permission to access both the models to view the report .

When you publish it will create the semantic model A and B as the direct query source for your pbix file . 

Thanks

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Hey powerbiexpert22 , 

Yes, you can create a Power BI report that uses or combines two or more Power BI semantic models as a source, but not in the traditional way of simply merging them like tables in Power Query. Power BI does not allow you to use multiple live connections in a single report.

However, you can combine multiple semantic models by using a composite model with DirectQuery for Power BI datasets. In this approach, you connect to one semantic model first, then add another Power BI semantic model as an additional source. Power BI converts the report into a composite model, allowing you to create relationships between tables from different models and build measures across them.

That said, there are some limitations, such as performance dependencies on both models and restrictions on relationship types (typically many-to-one). For long-term scalability and cleaner architecture, many organizations prefer creating a new centralized semantic model that integrates all required data sources and then building reports on top of that single model.

In summary, while you cannot directly merge multiple published semantic models through multiple live connections, you can combine them using composite models, which is the most practical supported approach.

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Hi powerbiexpert22 ,

Sure we can .there are limitations with respect to RLS/OLS.

please go through link below.

https://learn.microsoft.com/en-us/power-bi/transform-model/desktop-composite-models 

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Thanks and Regards,

Praful

Hi powerbiexpert22

This is possible. First, make sure the current PBIX file already contains data, then connect to the semantic models using DirectQuery.

To use measures from different semantic models together, there must be a shared (common) dimension between them. That common dimension should be used in the visual (e.g., in the table) so the measures can align correctly across models.

Also note that RLS and permissions are still enforced from the source semantic models. If a user doesn’t have access to a specific semantic model, the visuals that rely on it won’t return data (or may show an error), while the rest of the report can still load normally.

Power BI supports connecting to multiple semantic models using DirectQuery for Power BI datasets and combining them in one report.

• Connect to Semantic Model A → Get data → Power BI semantic model

• Then connect to Semantic Model B

• Power BI creates a composite model

• You can create relationships between tables from different models