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

The ultimate Microsoft Fabric, Power BI, Azure AI & SQL learning event! Join us in Las Vegas from March 26-28, 2024. Use code MSCUST for a $100 discount. Register Now

Reply
jonespossibly
Advocate I
Advocate I

Dax - find an item in last month's data

I've got data that gets produced on the first of the month and i need to  create a boolean column based on if a particular id in this month was also in the data from last month.

 

how do i go about that?

3 ACCEPTED SOLUTIONS
mhossain
Solution Sage
Solution Sage

@jonespossibly 

 

Assuming you have a Table1 with all the historical and latest data in there, and column name is ID.

COUNTIF for Duplicate IDs =
VAR __ID = Table1[ID]
RETURN
COUNTROWS(
FILTER(
ALL(Table1),
__ID = Table1[ID]
)
)

Hope this is what you are looking for.

View solution in original post

jonespossibly
Advocate I
Advocate I

ended up using this in the end as i needed the id and extra criteria:

 

var ID = 'table'[id]
var prevMonth = STARTOFMONTH( previousmonth( 'table'[reporting_date]) )
var result = LOOKUPVALUE( 'table'[extraCriteria],
'table'[id], ID,
'table'[reporting_date], prevMonth
)
return result
 
but your answer provided inspiration for it 🙂

View solution in original post

v-xiaoyan-msft
Community Support
Community Support

Hi @jonespossibly ,

 

Glad your problem is solved, can you accept the correct answer as solution, so that other users with similar problems to yours can find the solution faster, thanks in advance!

 

Hope it helps,


Community Support Team _ Caitlyn

If this post helps then please consider Accept it as the solution to help the other members find it more quickly.

View solution in original post

3 REPLIES 3
v-xiaoyan-msft
Community Support
Community Support

Hi @jonespossibly ,

 

Glad your problem is solved, can you accept the correct answer as solution, so that other users with similar problems to yours can find the solution faster, thanks in advance!

 

Hope it helps,


Community Support Team _ Caitlyn

If this post helps then please consider Accept it as the solution to help the other members find it more quickly.

jonespossibly
Advocate I
Advocate I

ended up using this in the end as i needed the id and extra criteria:

 

var ID = 'table'[id]
var prevMonth = STARTOFMONTH( previousmonth( 'table'[reporting_date]) )
var result = LOOKUPVALUE( 'table'[extraCriteria],
'table'[id], ID,
'table'[reporting_date], prevMonth
)
return result
 
but your answer provided inspiration for it 🙂
mhossain
Solution Sage
Solution Sage

@jonespossibly 

 

Assuming you have a Table1 with all the historical and latest data in there, and column name is ID.

COUNTIF for Duplicate IDs =
VAR __ID = Table1[ID]
RETURN
COUNTROWS(
FILTER(
ALL(Table1),
__ID = Table1[ID]
)
)

Hope this is what you are looking for.

Helpful resources

Announcements
Fabric Community Conference

Microsoft Fabric Community Conference

Join us at our first-ever Microsoft Fabric Community Conference, March 26-28, 2024 in Las Vegas with 100+ sessions by community experts and Microsoft engineering.

February 2024 Update Carousel

Power BI Monthly Update - February 2024

Check out the February 2024 Power BI update to learn about new features.

Fabric Career Hub

Microsoft Fabric Career Hub

Explore career paths and learn resources in Fabric.

Fabric Partner Community

Microsoft Fabric Partner Community

Engage with the Fabric engineering team, hear of product updates, business opportunities, and resources in the Fabric Partner Community.