Power Up Your Data Models: Best Practices for Relationship Design to Boost Performance in Power BI An efficient and well-designed data model is essential for improving performance in Power BI, especially when handling large datasets or complex queries. Proper relationship design within your data model can significantly enhance query speed and reporting efficiency. Below are best practices for improving data model performance in Power BI, focusing on relationship design. 1. Use a Star Schema Instead of Snowflake Star schema is a widely recommended data model structure for Power BI due to its simplicity and performance benefits. In this design, a central fact table is connected to surrounding dimension tables via one-to-many relationships. Avoid snowflake schema (where dimension tables are normalized and linked to other dimension tables) as it can lead to slower query performance and more complex relationships. Star Schema Example : Fact Table : Sales (contains transactions) Dimensio...