How To Count Dimension Values Without Duplicated Value?

Hi,

I have a two data sets. From that I have count the particular column value, but am getting duplicated value.Attached twbx for your reference.

Data 1 :

Code

Emp

ID

Data 2 :

Name

Emp

Salary

Expected Result : In Bar Graph, I should get value as 1 but am getting value as 6.

Result Am Getting :

Please any one help on this one.

Daniel Stanish