Understanding Data Modeling in Power BI: Joins, Relationships and Schemas Explained

Data Modeling in Power BI. A perfect data modeling is like a great relationship; clear, structured and created on the right connections. Data modeling in Power BI is a fascinating process where data relationships are created from tables and subsequently transformed into meaningful insights and interactive report. This process entail setting relationships, structures and calculations among the data table so that power BI can analyze and visualize them correctly. In this article, we shall dive into how Power BI creates data models by expounding on the topics below. 1. Joins. In power BI, joins are achieved through relationships in the model view or by merging queries in Power queries. The relationship/model view is more flexible approach as it creates a "virtual" join between tables via Key. Left Outer Joins. This is the most commonly used join for data modeling. Preserves all rows from the left table. Matching rows from the right table are appended; unmatched left rows get null values i