Understanding what’s the right cardinality
In the realm of Power BI data modeling, the concept of cardinality plays a pivotal role, influencing the dynamics of relationships between tables. Cardinality essentially defines how tables are interconnected, laying the groundwork for precise and efficient report generation. To grasp cardinality, imagine it as the rulebook that dictates how rows in one table relate to rows in another. A robust understanding of cardinality is fundamental for anyone creating a Power BI data model, as it underpins the accuracy and efficiency of subsequent reporting.
In this section, we’ll explore what cardinality is, why it’s essential, and how to make the right choices to ensure your data model is both accurate and high-performing. Let’s start!
Understanding cardinality
Cardinality is all about defining the nature of the relationship between two tables. It answers questions such as “For each row in Table A, how many...
