Remove duplicate values after separator in Calculated Column

[Iamnvt]

hi,

I need to use DAX calculate column function to remove the dupplicate value:

Input	Expected Output
A, A, B	A, B
B, B, C	B, C

how to do this?

thanks

[TomMartens]

Hey @Iamnvt ,

you can use this DAX to create a calculated column:

output = 
var _in = 'Table'[input]
var _inAsPath = SUBSTITUTE(_in , ", " , "|")
var _inPathLength = PATHLENGTH(_inAsPath)
var _T = CONCATENATEX(DISTINCT(SELECTCOLUMNS(ADDCOLUMNS(GENERATESERIES(1 , _inPathLength) , "@PathItem" , PATHITEM(_inAsPath , [Value] , TEXT)) , "@@pahItme" , [@PathItem])), [@@pahItme] , ", ")
return
_T 

This is how it looks like:

[Iamnvt]

@TomMartens  thanks for the answer

DAX in Power Pivot doesn't have GENERATESERIES function. 

is there any other way around?

[TomMartens · Accepted solution]

Hey @Iamnvt ,

in Power Pivot you are able to use the CALENDAR function as is described here:

https://www.sqlbi.com/articles/generating-a-series-of-numbers-in-dax/

Here is the DAX statement from above now using the function CALENDAR:

output calendar = 

var _in = 'Table'[input]
var _inAsPath = SUBSTITUTE(_in , ", " , "|")
var _inPathLength = PATHLENGTH(_inAsPath)
var _T = DISTINCT(SELECTCOLUMNS(ADDCOLUMNS(SELECTCOLUMNS(CALENDAR(1 , _inPathLength), "_Value", INT(''[Date])), "@item", PATHITEM(_inAsPath , [_Value] , TEXT)) , "@@item", [@item]))
return
CONCATENATEX(_T ,  [@@item], ", ")

Regards,

Tom