Скачать или смотреть LESSON 10060 | ROW CONTEXT EXPLAINED ONCE AND FOR ALL | Free DAX Course

In this video, I demystify the concept of row context in Power BI, a term that often intimidates beginners. You'll learn how row context simply refers to performing calculations horizontally, row by row, within a table—something you’ve likely already done without knowing the term. I guide you through creating a calculated column using DAX to compute total sales by multiplying unit price and quantity, and I explain how this process is inherently iterative. You’ll also see the contrast between iterating functions (like those from the X-family: SUMX, MAXX, etc.) that operate per row, and aggregating functions (like SUM) that process data vertically. We build on foundational Power Query lessons and reinforce DAX syntax and best practices for referencing columns, especially when working with a single table. This is a practical, no-jargon walkthrough that helps you finally understand row context in a clear, relatable way.

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All about DAX Structure:    • LESSON 10030 | UNDERSTANDING DAX FORMULA S...  
Iteration:    • LESSON 10130 | ITERATION IN POWER BI AND P...  
Aggregation:    • LESSON 10140 | AGGREGATION OR SUMMARIZATIO...  
Grouping:    • LESSON 10150 | GROUPING IN POWER QUERY: TH...  

Chapters
00:00 Understanding What "Row Context" Means in Power BI
01:02 Introducing the Sales Table and the Calculation Objective
02:03 Creating a Calculated Column for Total Sales
03:06 Writing DAX Expressions Using Full Column References
04:01 Simplifying Column References Within the Same Table
05:00 Row-by-Row Calculations and the Concept of Iteration
06:17 Distinguishing Row Context from Aggregation Functions
07:36 Visualizing Iterating vs Aggregating Functions in Action
08:30 Practical DAX Without Functions: Still Row Context
09:20 Summary and What’s Next: Text Functions in Row Context

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