Mean Median Mode using SQL and DAX

This article explains how to calculate the important statistical functions, MEAN, MEDIAN, and MODE, in both T-SQL and DAX.

Month-over-Month calculation using DAX in Power BI

Introduction Period-over-period is an analysis technique in business that measures some value in the present and compares it to the same measurement in a comparable period of time in the past. The goal is to adjust the slice of the past you are viewing, so the same amount of time has passed in the two […]

MAX() and MAXX()

Adding a dynamic ColumnId to a DAX Calculated Table

Learn how a calculated value can be added to a table with the missing key values filled in.

Getting Prior Year’s Year-To-Date with DAX

Kasper de Jonge takes a look at how to calculate a prior year’s year-to-date over the same period as the current year: Well maybe.. what happens here is that...

DAX Calculations with Invalid Boolean Predicates

Eugene Meidinger takes us through a DAX error: Whenever you start trying to use more complicated filters in the CALCULATE or CALCULATETABLE functions in DAX, you may start to get the following error:...

Using the DAX Calculate and Values Functions

In the first two articles in this series on creating DAX formulae, Andy Brown of Wise Owl Training showed how to create calculated columns and measures. In this third article, he turns his attention to two of the most important DAX functions (CALCULATE and VALUES), showing how and when to use them. If DAX knowledge can be compared to a heavily fortified castle, the CALCULATE function is the drawbridge giving access to it.

Creating Measures Using DAX

In the first article in this series, Andy Brown demonstrated how to create calculated columns in Power BI using the DAX language. This second article in the series explains what measures are, and how you can use DAX to create measures within Power BI. The formulae in the article apply equally well to PowerPivot and Analysis Services Tabular Model.

Calculating Employee Attrition with DAX – Part 2

In part 1, we described the requirements for calculating attrition and also demonstrated one method that doesn’t rely on writing DAX code at all. In the second part of this tip, we introduce alternative methods of creating a calculation in DAX to calculate the number of employees that have left the company.

Calculating Employee Attrition Rate with DAX – Part 1

In many businesses, the HR department needs reports on the employee attrition. This is the number of people that leave the company (depending on the reason they leave; the terminology can also be dismissals or turnover). Suppose you have a table with your employee data, where you also store a possible termination date. How do you calculate the number of people who have left the company using the DAX query language?