Displaying multiple rows in one

I'd like to display multiple rows in one. I have this as output:

name | value
------------
A    |     1
A    |     2
A    |     3
B    |     2
B    |     4
C    |     6

And I'd like to have:

name | value
------------
A    | 1,2,3
B    |   2,4
C    |     6

Is this possible?

Thanks in advance.