Top 5 DAX Functions to Master Power BI
There are hundreds of DAX Functions in Power BI 😱.
But you don't have to learn them all.
In all my experience working on client projects, I found myself using just these Top 5 DAX Functions most of the time.
And if you give me just a few minutes:
✔️ I will walk you through each one and...
✔️ Show you how to use them
Click Play ▶ below 👇 to watch:
Top 5 DAX Functions to Master Power BI
#5 SUM, COUNTROWS & A Bonus Function ➕
The first set of functions we cover are:
SUM: Sums up the values of a column.
COUNTROWS: Counts the number of rows in a table.
DISTINCTCOUNT (Bonus): Counts unique values in a column, making it indispensable when dealing with data where uniqueness matters.
You’ll find yourself reaching for these often when working with aggregations in Power BI.
#4 CALCULATE 🔢
If there’s one function in DAX that you’d call the MVP, it’s CALCULATE. This function lets you modify the filter context in Power BI. Imagine it as the engine that drives complex calculations, for example:
Calculate sales for a specific region.
Focus on data during a certain time period.
Mastering CALCULATE opens up a whole world of possibilities in DAX.
#3 X Functions: SUMX, MINX, MAXX etc. 🔄
Next, we dive into the world of X functions, including:
SUMX: Calculates the total revenue by multiplying quantity and price for each row before summing it all up.
MINX: Finds the minimum value row by row.
MAXX: Finds the maximum value row by row.
The X functions work row by row in a table, applying a calculation to each row and then aggregating the results. They are your toolbox for custom calculations.
Bonus: Mystery X Function 🔮
Here’s a mystery function that deserves special mention:
AVERAGEX: Works row by row but averages the results instead of summing them up.
AVERAGEX is great for scenarios where you want to find the average based on specific conditions or calculations.
#2 ALL Function: Hammer & Chisel Versions ⚒️
The ALL function is like having a hammer and chisel for your data models. It’s used to remove filters and return:
All the rows of a table.
All the values in a column.
This function is essential when:
You want to compare a specific value to the overall total.
You need to handle scenarios where filters might distort your calculations.
Master the ALL function, and you’ll be equipped to handle advanced scenarios with ease.
#1 Time Intelligence Functions 📅
Time Intelligence functions are a game-changer in Power BI. These include:
TOTALYTD: Calculates year-to-date totals.
SAMEPERIODLASTYEAR: Compares this year’s performance to last year.
DATESMTD: Calculates month-to-date totals.
They let you perform calculations over specific periods. If your reports involve dates or time, these functions are a must-have in your arsenal.
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