Explanation

Step 1: Create row-level security (RLS) roles
Create roles
Note: Provide all the customers with their own Power BI workspace to create their own reports. Each workspace will use the new dataset in the FinData workspace.
Implement subscription levels for the customers. Each subscription level will provide access to specific rows of financial data.
Deploy prebuilt datasets to Power BI to simplify the query experience of the customers.
Step 2: Create a DAX expression
Consider a model with two roles: The first role, named Workers, restricts access to all Payroll table rows by using the following rule expression:
FALSE()
Note: A rule will return no table rows when its expression evaluates to false.
Yet, a second role, named Managers, allows access to all Payroll table rows by using the following rule expression:
TRUE()
Take care: Should a report user map to both roles, they'll see all Payroll table rows.
Step 3: Add members to row-level security (RLS) roles
Configure role mappings
Once [the model is] published to Power BI, you must map members to dataset roles.
Reference: https://docs.microsoft.com/en-us/power-bi/guidance/rls-guidance
Topic 1, Contoso, Ltd
Overview
Contoso, Ltd. is a company that sells enriched financial data to a variety of external customers.
Contoso has a main office in Los Angeles and two branch offices in New York and Seattle.
Data Infrastructure
Contoso has a 50-TB data warehouse that uses an instance of SQL Server on Azure Virtual Machines.
The data warehouse populates an Azure Synapse Analytics workspace that is accessed by the external customers. Currently, the customers can access alt the data.
Contoso has one Power Bl workspace named FinData that contains a single dataset. The dataset contains financial data from around the world. The workspace is used by 10 internal users and one external customer.
The dataset has the following two data sources: the data warehouse and the Synapse Analytics serverless SQL pool.
Users frequently query the Synapse Analytics workspace by using Transact-SQL.
User Problems
Contoso identifies the following user issues:
* Some users indicate that the visuals in Power Bl reports are slow to render when making filter selections.
* Users indicate that queries against the serverless SQL pool fail occasionally because the size of tempdb has been exceeded.
* Users indicate that the data in Power Bl reports is stale. You discover that the refresh process of the Power Bl model occasionally times out Planned Changes Contoso plans to implement the following changes:
* Into the existing Power Bl dataset, integrate an external data source that is accessible by using the REST API.
* Build a new dataset in the FinData workspace by using data from the Synapse Analytics dedicated SQL pool.
* Provide all the customers with their own Power Bl workspace to create their own reports. Each workspace will use the new dataset in the FinData workspace.
* Implement subscription levels for the customers. Each subscription level will provide access to specific rows of financial data.
* Deploy prebuilt datasets to Power Bl to simplify the query experience of the customers.
* Provide internal users with the ability to incorporate machine learning models loaded to the dedicated SQL pool.