Problem with 1:n relationship

[Prodingero]

 I want to relate two tables 'OE' and and 'Salary' with  1:n relationship.
'OE' contains the column with unique Key OE3 and 'Salary' contains the column OE3.
If i want to activate the relationshop, there comes the meesage that the 1:n is not possible.
What´s the reason?  

[Prodingero]

No, last step creating table 'OE' ist deleting duplicates.

[AntrikshSharma · Accepted solution]

@Prodingero Your OE3 column in OE contains duplicates?

[Prodingero]

sorry, you are right, there were duplicates. Problem was there were two values, one without last <Space> one with last <space>. I have found it. Interestingly in Excel and Power BI it is be used as identic value. Only powerquery knows, that therae ar two different values. Now I have deleted the last space, delted duplicates and now I can use 1:n relationship.

[AntrikshSharma]

Yup, I have encountered this with SQL Server, two values 'Contoso' and 'Contoso   ' are considered the same in SQL Server, but Power Query doesn't considers this so it shows both Contoso in the drop down.

DECLARE @test TABLE (Brand VARCHAR(20))
	
INSERT INTO @test 
VALUES 
('Contoso'), 
('Contoso ' ), 
('Contoso    ')

SELECT DISTINCT * 
FROM @test