Showing results for 
Search instead for 
Did you mean: 
RossCurrie15 Frequent Visitor
Frequent Visitor

New to Power BI

Relatively new to Power BI. Looking for some guidance?


Loaded up two tables with very similar data with different names, only one column differs in values. I would like to compare the two values together to understand variance between the two? Is this creating a measure or using relationships? Tried to use relationship however got error message regarding columns not having unique values?

Super User
Super User

Re: New to Power BI

Could you post some sample data or some made up data that emulates your data? 

I have book! Learn Power BI from Packt

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

Proud to be a Datanaut!

RossCurrie15 Frequent Visitor
Frequent Visitor

Re: New to Power BI

If i load up two different tables, "Sales 1" and "Sales 2" which have all the same column headers except one where Sales 1 has"This year" and Sales 2 has "last year" where the values differ and i want to compare these two columns to understand the variance, how could this be done?

Moderator v-yuezhe-msft

Re: New to Power BI

Hi @RossCurrie15,

You can use “Merge Queries “ feature to join the two tables tomake the "last year" column and "This year" column in a single table such as Sales 1, then create a new column in Sales 1 using formula like: Difference = 'Sales 1'[This year]-'Sales 1'[NewColumn.Last year] to compare values of the two different columns. For more details about how to use Merge Queries  “ feature, please review this blog: .

And you can check the example in this attached PBIX file. If you don’t get expected result, please help to post sample data of your scenario.

Lydia Zhang

Community Support Team _ Lydia Zhang
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

Helpful resources

New Topics Started Badges Coming

New Topics Started Badges Coming

We're releasing new versions of the badge that everyone's talking about. ;) Check your inbox for notifications.

MBAS 2020

Save the new date (and location)!

Our business applications community is growing—so we needed a different venue, resulting in a new date and location. See you there!

Difinity Conference

Difinity Conference

The largest Power BI, Power Platform, and Data conference in New Zealand

Top Solution Authors
Top Kudoed Authors (Last 30 Days)