Count Duplicates that appear in other sources within one table

[jaltoft]

Hello,

I am wanting to count the duplicate ids which appear within other tables contained within my model.

So within table 1 (List 1) I want to add columns for each list I have 1-9 etc.

If so within List 1 (table) I will have a new column called list 2 which will count how many times the id within the row in list 1 appears in list 2. I will have this for each list.

All tables have a column called Id in which the id is could be shown more than once.

Ideally I want to do this without using a relationship between these tables, an inderect relationship is fine.

Thanks in advance

[Greg_Deckler · Accepted solution]

@jaltoft Not sure I specifically understand. You should be able to do something like:

COUNTROWS(FILTER('Table2',[table2ID] = [ID]))

Sorry, having trouble following, can you post sample data as text and expected output?
Not really enough information to go on, please first check if your issue is a common issue listed here: https://community.powerbi.com/t5/Community-Blog/Before-You-Post-Read-This/ba-p/1116882

Also, please see this post regarding How to Get Your Question Answered Quickly: https://community.powerbi.com/t5/Community-Blog/How-to-Get-Your-Question-Answered-Quickly/ba-p/38490

The most important parts are:
1. Sample data as text, use the table tool in the editing bar
2. Expected output from sample data
3. Explanation in words of how to get from 1. to 2.

[jaltoft]

Great replys, thanks both. @tamerj1 @Greg_Deckler 

[tamerj1 · Accepted solution]

Hi @jaltoft 

please use

List2 Id's =
COUNTROWS ( FILTER ( List2, List2[Id] = List1[Id] ) )

[Greg_Deckler · Accepted solution]

@jaltoft Not sure I specifically understand. You should be able to do something like:

COUNTROWS(FILTER('Table2',[table2ID] = [ID]))

Sorry, having trouble following, can you post sample data as text and expected output?
Not really enough information to go on, please first check if your issue is a common issue listed here: https://community.powerbi.com/t5/Community-Blog/Before-You-Post-Read-This/ba-p/1116882

Also, please see this post regarding How to Get Your Question Answered Quickly: https://community.powerbi.com/t5/Community-Blog/How-to-Get-Your-Question-Answered-Quickly/ba-p/38490

The most important parts are:
1. Sample data as text, use the table tool in the editing bar
2. Expected output from sample data
3. Explanation in words of how to get from 1. to 2.