Explanation Grouping table functions have only one purpose, and that is to create a distinct combination of columns/tables supplied. Grouping functions are mostly used as intermediate steps in DAX code. Most use cases: Create a set of values on a higher granularity which you need to iterate upon eq. Find the best-selling product in each …
What are DAX Table Functions? Up until now, we used only functions which return scalar values. What is a scalar value? That is a value that can be represented in a single point in a visual. Measures can only return scalar values. If you try to return a table or column with a measure, you …
Iterative functions have one special ability, and that is to form a “Virtual” row context for the table supplied as an argument. Table vs Scalar Iterative Functions The most used iterative functions are: SUMX, MINX, MAXX, AVERAGEX, CONCATENATEX, COUNTX, RANKX Pretty much any function ending with X All those functions have 2 things in common, …
When first getting acquainted with DAX and modeling, it’s confusing when to create calculation logic in a Calculated Column and when to use Measures. Quite often novice users try to push all calculations to Calculated Columns, then drag them to the Values field of the visual (making an implicit Measure) or performing a simple Explicit …
DAX HANDBOOK
2.3 Columns vs Measures (Implicit vs Explicit Measures) Read More »
Columns Overview In general, the data model consists of Tables. Tables consist of Columns. Columns are used to form Filter context by plotting them on the canvas in filter fields. They are also used as building blocks of DAX Measures. We can say that columns are the most used objects in data modeling. In import …
Measure Explanation Measures are the most important objects in your data models. They are the ones that provide dynamic results based on different combinations of filters plotted on visuals. They are also the most complex ones since they change results with each interaction in a report. To be able to produce the correct result while …
DAX Demystified DAX is a functional language. It consists of more than 250 functions. This seems like a lot right? Learning how to properly use 250+ functions seems like a daunting job, but here is the secret. You do not need to learn by heart all of them but instead try a different approach. DAX …
What is DAX? DAX (Data Analysis Expressions) is a functional programming language used to manipulate with several Microsoft BI tools. Microsoft BI tools that use DAX: PowerBI (Tabular model) Excel (PowerPivot) Analysis Services (Tabular model) With DAX you are able to “talk” with the data model, adjust it using calculated columns or return results from …
We can define coalesce in PowerQuery as the last value existing in a single row of multiple columns positioned from left to right. In our example that would be the last value from the month columns. In this article, we will show you how to create both static and dynamic formulas for coalescing. If you …
Let us imagine the following scenario. We have multiple clients sharing their sales data with us. They store the data in dedicated folders that reside in different places. The number of clients, as well as the number of files for each client, will vary across periods. We wish to create an automatic refresh system that …
How to process multiple folders with a single PowerQuery script Read More »
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