cancel
Showing results for 
Search instead for 
Did you mean: 
Reply
Highlighted
Anonymous
Not applicable

Left joins generate duplicate values issue

Hello,

 

I am trying to join two tables with a left join UNITS (left table) and TENANT(right table) tables. After the join I am extending the values I want to add in my table and they extend with no problem. The problem is that for some reason new rows are being added in my table and I receive an error message for duplicate ID (primary key) values as a result of the raws addition. Please see a screenshot of this message below.

index issue.PNG

 

Can you please support with this? 

 

Many thanks,

MariosChr90

1 ACCEPTED SOLUTION

Accepted Solutions
Super User IX
Super User IX

Re: Left joins generate duplicate values issue

The issue is that you are likely extending a column that then generates a duplicate row for 99. So, you can imagine how this might happen. When you join the tables, you are aggregating multiple rows from TENANTS for "99" to a single row. But, when you expand the aggregation, you end up with multiple rows of 99 and hence you are getting an issue with your relationship.


---------------------------------------

Not link spamming! If I posted a link in reply it is because I did assume you know how to search the web but thought it was the fastest way to fix your issue.

I have a NEW book! 
DAX Cookbook from Packt
Over 120 DAX Recipes!




Did I answer your question? Mark my post as a solution!

Proud to be a Super User!




View solution in original post

2 REPLIES 2
Super User IX
Super User IX

Re: Left joins generate duplicate values issue

The issue is that you are likely extending a column that then generates a duplicate row for 99. So, you can imagine how this might happen. When you join the tables, you are aggregating multiple rows from TENANTS for "99" to a single row. But, when you expand the aggregation, you end up with multiple rows of 99 and hence you are getting an issue with your relationship.


---------------------------------------

Not link spamming! If I posted a link in reply it is because I did assume you know how to search the web but thought it was the fastest way to fix your issue.

I have a NEW book! 
DAX Cookbook from Packt
Over 120 DAX Recipes!




Did I answer your question? Mark my post as a solution!

Proud to be a Super User!




View solution in original post

Highlighted
Anonymous
Not applicable

Re: Left joins generate duplicate values issue

Yes I see, I have resolved the issue. I just remove manually the one duplicate value of '99'.

 

Many thanks for the support!

Helpful resources

Announcements
Ignite

Microsoft Ignite

This will be a conference that you do not want to miss!

Get Ready for Power BI Dev Camp

Get Ready for Power BI Dev Camp

Don't miss the Power BI Dev Camp this week!

August Community Highlights

Check out a full recap of the month!

August 2020 CYST Challenge

Check out the winners of the recent 'Can You Solve These?' community challenge!

Experience what’s next for Power BI

Join us for an in-depth look at the new Power BI features and capabilities at the free Microsoft Business Applications Launch Event.

Top Solution Authors