Grouping by Comma in new column using DAX Only

Question

Hi,
If I have a table like this,
column1, column2
A | apple
A | Orange
B | banana
C | Staple
B | Pencil
How do I group it like this in power pivot,
Column1 | Column2,Column3
A | apple |
apple, orange
A | Orange |
apple, orange
B | banana |
banana, pencil
C | Staple |
Staple
B | Pencil |
banana, pencil
Thanks,

Answer 1

Thanks Avichal,
I was looking for something like the power query solution but in Power Pivot (since some of the data connections I use are odbc and they don't work in power query).
Here's the data that I'm working with
Table 1
Product | Received Date | Received Qty
A | 01/02/2014 | 4500
B | 01/02/2014 | 3500
C | 01/03/2014 | 400
D | 01/04/2014 | 47
A | 01/05/2014 | 350
D | 01/06/2014 | 200
C | 01/07/2014 | 150
E | 01/08/2014 | 20
B | 01/09/2014 | 430
A | 01/09/2014 | 330
*** millions of rows***
Final report that I wanted to create is,
Product | Receive dates(Measure) | Total Received(Measure) 
A | 01/02/2014, 01/05/2014, 01/09/2014 | 5,180 
B | 01/02/2014, 01/09/2014                    | 4,930 
I'm trying to figure out how I can combine the dates like this in Receive dates measure, I also want this  to be dynamic, so I I filter the dates Slicer to certain dates say may 2014, it only shows the Receive dates in may 2014.
It may be too complicated but my ultimate goal is to make it like this 
Product | Receive dates : Receive qty(Measure) | Total Received(Measure) 
A | 01/02/2014: 4500, 01/05/2014: 350, 01/09/2014 : 330 | 5,180
B | 01/02/2014: 3500 , 01/09/2014: 430                    | 4,930 
Let me know if this possible,