Building Better Power BI Models; A Guide to Relationships, Fact Tables, Star Schema, and Joins

Short summary

Power BI reports depend on properly structured data models with fact tables storing transactions and dimension tables providing context. Star schema offers simpler, faster queries; Snowflake schema reduces redundancy but adds complexity. Understanding cardinality (one-to-many, many-to-many) and cross-filter direction ensures accurate filtering and calculations.

• •Fact tables contain measurable business data; dimension tables provide context through relationships
• •Star schema is recommended for performance; Snowflake schema reduces redundancy but increases query complexity
• •Cardinality and cross-filter direction control how records relate and data flows between tables

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