What is ambiguity in relationships and performance risk?

< 1 min read

Ambiguity in relationships occurs when multiple paths exist between tables, creating unclear filter flow.
In one project, two relationships between Sales and Product caused conflicting filter context in reports.
This led to incorrect aggregations and slower DAX evaluations.
DAX measures sometimes returned unexpected results due to ambiguous paths.
High-cardinality tables with ambiguous links amplified calculation cost.
We resolved it by deactivating unused relationships or using USERELATIONSHIP in measures.
Ambiguity increases processing time and risks inaccurate reporting.
So clear, well-defined relationships are critical for both accuracy and performance.

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