Count rows (duplicates) in Query Editor

[Rygaard]

I have a table "Sales _Offers"

and i have a column "Name_trimmed_striped"

I want to add a new column that make a count for each line how many times it occures

(NOT IN DAX, but still in the import Power Query Editor)  

customer	Name_trimmed_striped	the column i want to make
a	road123	2
a	vestroad412	1
v	road123	2
b	vestroad41234165	1

it would be easy to use groupe by, but i need all the lines intact.

it would also be easy to make a new table then group by in that, then merge to 2 to get a value looked up  (but since its 19 million lines this seems like a bad idea)

tried to use Table.RowCount   and im guessing that is what i need.. but cant fugure out how to make it work

[Rygaard]

I did not accept this as a solution, sinces it does exactly what i did not want,  It was NOT supose to happen in DAX but during import.  - also if you want to do it in dax, then there is a much shortwer and more efficiant way to do it using "Earlier"

Count number of occurences = CALCULATE(COUNT('Sales_Offers'[Name_trimmed_striped]), 'Sales_Offers'[Name_trimmed_striped] = EARLIER('Sales_Offers'[Name_trimmed_striped]))

But thank you for taking time to try and help me - and sorry if I did not formulate the question precise in the opening question @v-binbinyu-msft 

[Rygaard]

This is still not the solution i wanted since i wanted it in import, but it is better than the one that was accepted as a solution (not by me)

[v-binbinyu-msft]

Hi @Rygaard ,

Please try below steps:

1. below is my test table

Table:

2. create measure with below dax formula

Measure =
VAR cur_nts =
    SELECTEDVALUE ( 'Table'[Name_trimmed_striped] )
VAR tmp =
    FILTER ( ALL ( 'Table' ), 'Table'[Name_trimmed_striped] = cur_nts )
VAR tmp1 =
    SUMMARIZE ( tmp, [Name_trimmed_striped], "CTR", COUNT ( [Customer] ) )
VAR _str =
    CONCATENATEX ( tmp1, [Name_trimmed_striped] & [CTR], "" )
VAR num =
    LEN ( cur_nts )
VAR _val =
    MID ( _str, num + 1, LEN ( _str ) )
RETURN
    _val

3. add a table visual with fields and measure

Please refer the attached .pbix file.

Best regards,
Community Support Team_Binbin Yu
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.