Summary  
This chapter explains how to build a star‐schema data model by defining one-to-many relationships (including a dedicated date table) and how to author DAX measures—using functions like SUM, DISTINCTCOUNT, DIVIDE, SUMX, and FORMAT—to calculate aggregated values, ratios, and formatted outputs.  

General domain of usage  
Business intelligence reporting

The solution walkthrough for creating relationships and DAX measures. After attempting the build on your own, watch this chapter to compare your approach with the reference solution. You will create the star schema and relationships amongst all your tables, as well as create six measures in total: Total Sales, Order Count, Avg Order Value, Profit Margin, Avg Discount, and Margin vs Target.

Master the skills needed to turn raw data into professional, interactive reports using Power BI. You'll connect to data sources, clean and transform data with Power Query, build data models, write DAX measures, and publish polished dashboards to Power BI Service. No prior experience required.

Get hands-on experience with Power BI Desktop: understand where it fits in the modern data stack, install it, explore the interface, connect to your first dataset, and build your first bar chart.

Master the skills needed to clean, transform, and combine data using Power Query – from filtering rows and adding columns to merging tables and reshaping data with pivot operations.

Explore the essentials of relational data modeling and DAX – build star schemas, define relationships, write measures, and use time intelligence functions to answer real business questions.

Dive into the fundamentals of Power BI visuals – choose the right chart type, configure slicers and filters, add drillthrough navigation, and create bookmark-driven interactive experiences.

Transform the way you present data by applying layout and design principles, building multi-page reports, setting up row-level security, and publishing to Power BI Service with scheduled refresh.

Gain a solid understanding of the end-to-end Power BI workflow by completing a guided project – from data preparation and modeling to building a multi-page dashboard and publishing it to the Service.

Relationships and DAX