VS 2010 [RESOLVED] Summing up Duplicates and Counting

Hi all,

I know this probably a simple one.

But if i have data in my database like

PartNumber:
How can i display it on a datagirdview like

Column1 -- Column2
AAAA -------- 4
BBBB -------- 2
CCCC -------- 1
DDDD -------- 1

Thanks in advance
Alex