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

Data Modeling is the process of analyzing and defining different data type that is collected or produced. It also shows relationship between those data in visual form as data is captured, stored ans used in different ways as per the owner/business. Without a well-structured data model, dashboard in power BI can produce misleading insights,Poor performance and confusion. In this article we will cover SQL joins, Relationship in Power BI,Schemas and common modeling issues. SQL Joins Type Joins combines data from multiple tables based on related column. In Power BI it happens before data is loaded into the model. Inner Join- Returns to rows where there is matching values in both tables. It can be used to match employees to departments or authors to books. Left Join-Returns all rows from left table and matched rows from the right. It can be used to list all departments and their employees Right Join- Returns all rows from the right table and matched rows from the left. It will show all depa