Question

How can I retrieve a mapped value from a many-to-one related table in Power BI when using DirectQuery mode?
I’m working on a DirectQuery model in Power BI and need to fetch mapped values from a many-to-one related table. What is the best approach to accomplish this while maintaining query performance and data accuracy?

Answer 1

Get the associated values per multiple linked columns in the DirectQuery mode of Power BI, ensuring better performance and data accuracy:

Use a Relationship in DAX: You should use the RELATED() function from DAX to fetch values associated with the other table, making sure that it yields these values without querying the entire data.

Keep the Model Simple: Be very clear,' he said,' that a relationship isn't one-to-many. Complexity can slow down data queries.

Use Usefulness in Queries: Make sure that indexed fields are set according to the relationships to improve query time.

Allow for Unidirectional Filtering: Eliminate and minimize bi-directional relationships as far as cross-table filtering is avoided or not recommended because of the resultant performance degradation:

The above allows optimum data retrieval ease, while a person can highly improve Direct Query Performance.