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

Try your skills in the Power BI Dataviz World Championship! Round one ends June 26. Join now

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
Fabric Data Days is here Carousel

Data Days 2026

Don't miss out on Data Days, June 15 through August 7. Learn Fabric, Power BI, SQL, AI and more.

Power BI DataViz World Championships carousel

Power BI DataViz World Championships - June 2026

A new Power BI DataViz World Championship is coming this June! Don't miss out on submitting your entry.