Question

you create a power bi desktop project that retrieves data from a microsoft sql server by using directquery connection mode. your queries generate two tables named enrollments and teacher. a sample data of tables is shown in the picture. you want to get more efficient queries, so you plan to enable the assume referential integrity option. is it a good solution in this case?

Answer 1

Enabling the assume referential integrity option in Power BI Desktop can improve query performance, but it should only be done if the referential integrity constraint is correctly defined and enforced.

Step-by-step explanation:

The correct answer is option Yes. Enabling the assume referential integrity option in Power BI Desktop can improve query performance when using a DirectQuery connection to retrieve data from a Microsoft SQL Server.

When this option is enabled, Power BI can make certain optimizations based on the assumed relationship between tables, such as minimizing the number of rows it accesses when executing a query.

This assumption is valid when there is a referential integrity constraint defined between the tables in the SQL Server database. Referential integrity means that the relationships between foreign keys and primary keys are enforced, ensuring the consistency and integrity of data.

By enabling the assume referential integrity option, Power BI can take advantage of this relationship and optimize the queries accordingly.

However, it's important to note that enabling this option assumes that the referential integrity constraint is in place and correct. If the constraint is not properly defined or enforced, enabling this option can result in incorrect query results.

It's crucial to verify and ensure the consistency of data in the SQL Server database before enabling the assume referential integrity option in Power BI Desktop.