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

The Power BI Data Visualization World Championships is back! Get ahead of the game and start preparing now! Learn more

Reply
joschultz
Advocate II
Advocate II

Relationships

 

 

I keep getting an error that tells me I cannot create a relationship between two tables because one of them has to have unique values.  Can someone explain this to me? Don't you need to join the tables together by a common point?

 

Thank you,

 

Joseph

1 ACCEPTED SOLUTION

A unique value is a column that does not contain any duplicates, thus unique. 

 

UNIQUE             NOT UNIQUE

1                         1

2                         1

3                         2

4                         3

5                         1

 

View solution in original post

4 REPLIES 4
Greg_Deckler
Community Champion
Community Champion

One of the tables has to have unique values. If you cannot do that with your two tables, create a third table that pulls all of the values from both tables (merge step) and then does a "Unique values" step. Then, link both tables to that third table.



Follow on LinkedIn
@ me in replies or I'll lose your thread!!!
Instead of a Kudo, please vote for this idea
Become an expert!: Enterprise DNA
External Tools: MSHGQM
YouTube Channel!: Microsoft Hates Greg
Latest book!:
DAX For Humans

DAX is easy, CALCULATE makes DAX hard...

but what is considered a unique value? 

A unique value is a column that does not contain any duplicates, thus unique. 

 

UNIQUE             NOT UNIQUE

1                         1

2                         1

3                         2

4                         3

5                         1

 

That makes total sense.  Thank you!!!!

Helpful resources

Announcements
Power BI DataViz World Championships

Power BI Dataviz World Championships

The Power BI Data Visualization World Championships is back! Get ahead of the game and start preparing now!

December 2025 Power BI Update Carousel

Power BI Monthly Update - December 2025

Check out the December 2025 Power BI Holiday Recap!

FabCon Atlanta 2026 carousel

FabCon Atlanta 2026

Join us at FabCon Atlanta, March 16-20, for the ultimate Fabric, Power BI, AI and SQL community-led event. Save $200 with code FABCOMM.