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

Earn the coveted Fabric Analytics Engineer certification. 100% off your exam for a limited time only!

Reply
tstackhouse
Helper III
Helper III

Creating relationship without unique values

 

Hello All, 

 

I have been try to create a relationship between two columns in power BI but I am getting the message "You cant create a relationship between these two columsn because one of the columns must have unique values".

 I have created the same relationship in Tableu and built a report with a few measures to verify aginst existing reports (which did match)

 

I have tried to look this up on the forums but I do not seem to have found a solution that works for me. Below I have two snaps from Power Bi and Tableu to give a visual.

 

Thanks,

Ty

 

PBI Capture.PNGTab Capture.PNG

1 ACCEPTED SOLUTION
Anonymous
Not applicable

Hi @tstackhouse

 

Power BI supports, 1:1, 1:M, M:1 relationships only, not M :M. But there is a work around for this.

 

Option 1. Create a relationship/ bridge table to handleM:M

Option 2. Create a Unique column in your current tables ( For example: By concatenating 2 columns to make the values unique).

 

Thanks

Raj 

View solution in original post

4 REPLIES 4
Faye1901
Helper I
Helper I

Hi there,

I have a similar problem which I can't seem to resolve with this solution. I also want to create a relationship without unique values. Steps I've taken:
1. Appended query from my two tables - this didn't append properly as both my columns [Project Code] appeared separately but nonetheless I then ...
2. Removed all other columns but the [Project Code 1] and [Project Code 2] that I wanted to append.
Now I get two columns with corresponding null values in each column - see below. If I filter one or other column to remove the nulls the corresponding column reduces in length so I lose my data. Any idea how I can remove the nulls from each column and append as one? Or do I need to understand why the Append Query as new didn't work in the first place?
Failed append.PNG

Thanks
Faye

Anonymous
Not applicable

Hi @tstackhouse

 

Power BI supports, 1:1, 1:M, M:1 relationships only, not M :M. But there is a work around for this.

 

Option 1. Create a relationship/ bridge table to handleM:M

Option 2. Create a Unique column in your current tables ( For example: By concatenating 2 columns to make the values unique).

 

Thanks

Raj 

I have the same problem but this time with dates. I have two different tables I want to show these records on a single line graph showing how they both performed on specific dates. Obviously this means some dates will have multiple records. So it will not be unique. How do i go around this?

Firrhos
Frequent Visitor

Hello,

 

I think this is what you are looking for. 🙂 https://blogs.technet.microsoft.com/cansql/2016/12/19/relationships-in-power-bi-fixing-one-of-the-co...

Hope it helps.

 

Kind regards,

Tristan

Helpful resources

Announcements
April AMA free

Microsoft Fabric AMA Livestream

Join us Tuesday, April 09, 9:00 – 10:00 AM PST for a live, expert-led Q&A session on all things Microsoft Fabric!

March Fabric Community Update

Fabric Community Update - March 2024

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