Power Bi: Data Modelling, Relationships and Joins

Data modelling in Power BI involves organizing data into tables and defining their relationships to ensure accurate and efficient analysis. It serves as a blueprint for data structures. Many issues appearing as DAX problems actually stem from flaws in the data model, such as incorrect totals, malfunctioning slicers, or decreased report speed as data volume increases. Proper shaping and connecting of tables are essential to avoid these common pitfalls and maintain optimal performance within the reports.