What is star schema advantage for performance?

< 1 min read

Star schema improves performance by organizing data into a central fact table and related dimension tables.
In one project, switching from a flat table to star schema reduced redundant joins.
Aggregations and calculations became faster because measures operated on the fact table only.
Filter propagation from dimensions to fact is simple and efficient.
High-cardinality columns are isolated in fact tables, improving compression.
It reduces query complexity and speeds up DAX evaluations.
Visual interactions like slicers and drill-through perform better.
Overall, star schema enhances refresh speed, query efficiency, and report responsiveness.

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