Skip to main content
cancel
Showing results for 
Search instead for 
Did you mean: 

Join us for an expert-led overview of the tools and concepts you'll need to become a Certified Power BI Data Analyst and pass exam PL-300. Register now.

Reply
Anonymous
Not applicable

DAX SQL window function equivalent

Hello,

 

I would like to create a calculated column that returns a total row count per customer, as below.

 

http://imgur.com/WJ2MzJS

 

To do this with SQL, one approach would be to use a window function like:

 

COUNT(*) OVER (PARTITION BY CUSTOMER ORDER BY NULL)

 

Could someone please demonstrate how to achieve the same result using DAX?

 

Thanks!

 

Pbix

1 ACCEPTED SOLUTION
Eric_Zhang
Microsoft Employee
Microsoft Employee

@Anonymous

Check

 

Column =
COUNTAX (
    FILTER ( 'Table', EARLIER ( 'Table'[Customer No.] ) = 'Table'[Customer No.] ),
    'Table'[Product Purchased]
)

 Capture.PNG

 

A good site for your reference.

View solution in original post

3 REPLIES 3
Eric_Zhang
Microsoft Employee
Microsoft Employee

@Anonymous

Check

 

Column =
COUNTAX (
    FILTER ( 'Table', EARLIER ( 'Table'[Customer No.] ) = 'Table'[Customer No.] ),
    'Table'[Product Purchased]
)

 Capture.PNG

 

A good site for your reference.

What if we have unsorted list of Customer No.? They this formula shouldn't work, yes?

Anonymous
Not applicable

Lovely, thanks very much.

 

 

Helpful resources

Announcements
Join our Fabric User Panel

Join our Fabric User Panel

This is your chance to engage directly with the engineering team behind Fabric and Power BI. Share your experiences and shape the future.

June 2025 Power BI Update Carousel

Power BI Monthly Update - June 2025

Check out the June 2025 Power BI update to learn about new features.

June 2025 community update carousel

Fabric Community Update - June 2025

Find out what's new and trending in the Fabric community.