This document provides a step-by-step guide on creating a DAX measure in Power BI to show the sales of the top 5 products and calculate their percentage of total sales. It explains the use of the TOPN function to identify the top products and how to aggregate their sales values for display. The guide also mentions the creation of additional measures for the bottom 20 products and encourages readers to visit the website for more tips.

1. How to create
A Top 5 Measure
in Power BI

2. Top 5 in a Measure
Although Power BI has
an built-in Top N filter
feature
It is often useful to be
able to show that value
as a measure and what
percent of the whole it
represents
This guide shows you
how to do it

3. Step by Step
Create a measure to
aggregate sales for the
top 5 products
We create a Variable to
identify the top 5
products, and a
separate variable to
aggregate the sales
amount
This makes the DAX
easier to follow
Top 5 Products Sales =
VAR TopNProducts =
TOPN (
5,
SUMMARIZE(Sales,
'Product'[Product],"SALESVALUE",sum(Sales[Sales Amount])),
[SALESVALUE],desc
)
VAR Result =
CALCULATE (
SUM(Sales[Sales Amount]),
TopNProducts
)
RETURN Result

4. DAX Breakdown
SUMMARIZE creates subtotals, in this case a column with each ‘Product’
and a second column for the total sales
SUMMARIZE(Sales, 'Product'[Product],"SALESVALUE",sum(Sales[Sales
Amount]))
TOPN – The ‘5’ sets how many top rows to return
We use the summarise row to define the data rows (see above)
The last row defines the field to sort by (SALESVALUE in Descending order)
TOPN (
5,
SUMMARIZE(Sales, 'Product'[Product],"SALESVALUE",sum(Sales[Sales
Amount])),
[SALESVALUE],desc

5. DAX Breakdown
Next we calculate the Sum of Sales for each Product in the Top N products
VAR Result =
CALCULATE (
SUM(Sales[Sales Amount]),
TopNProducts
)

6. Top X in a Measure
We have then used this
measure on a card to
highlight how much of the
total the top X products
represent
We added a simple
secondary measure showing
what percentage this is
We then created similar for
the bottom 20 products
And Finally added these to
the chart

7. Hope you find these useful

8. For more Tips, Tricks and
Timesavers, visit our website
Tips and Timesavers | Select Distinct Limited
Credit: simon.harrison@selectdistinct.co.uk