Tag: filter context

Explaining Row Context in Power BI

I have found out that most people get confused in regards to understanding how DAX works in row context. This is because row context can be quite complicated and unnecessarily so. So we’re going to touch on row context throughout this article. The way I think about row context is through iterations or iterating functions.

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Introduction to Filter Context in Power BI

Filter context is one of the major topics that any Power BI user should initially learn about, especially if you want your DAX calculations to work effectively. In this article, I will run through the filter context. Every DAX formula is calculated in a two-step process. DAX Formula: A Two-Step Process The first step is

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Understanding Evaluation Context in Power BI

The most important concept in understanding DAX is context. There are three main types of context: the evaluation context, the filter context, and the row context. When DAX calculates something in Power BI, it works via a two-step process. At first, it evaluates the context it is currently in. Once it has done that, it

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Calculating % of Totals

A really common calculation that we require quite often is to calculate the % of a total amount. This is great to quickly show where the larger portion of results sitĀ versus the entire population. Completing this in Power BI does not require much written code, but it does require some understanding. It will generally be

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How the DAX Calculation Engine Works

Breaking down the way DAX works The DAX engine is a complex beast. How it stores the data, then works through it to calculate answers is quite spectacular. Let’s step back for a moment though and try to distill it down into some simple steps, that we can memorise and intuitively start iterating over when

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