SQL Combine two Rows

[rmkilc]

Let's say I have a table like this to make things simple:

UUID	blockID	Destroyed	Placed

bob 	1 	107 		627
steve	1 	1560 		97
joe	1	136		11
bob 	2 	1294 		741
steve	2 	8121 		4465
joe	2	0		51
bob 	3 	138 		443
steve	3 	2475 		1783
joe	3	50		89
bob 	4 	2 		2
steve	4 	4 		35
joe	4	1		5

I want to combine the data for bob and steve into just steve. What SQL code would I use to merge bob and steve together per blockID, and for Destroyed and Placed, end up with the sum of of them added together?

[something else]

this is how i would do it with a little php:

$something = mysql_query("SELECT blockID, SUM(Destroyed) AS Destroyed, SUM(Placed) AS Placed FROM tablename WHERE UUID='steve' OR UUID='bob' GROUP BY blockID");
while ($else = mysql_fetch_array($something))
{
mysql_query("UPDATE tablename SET Destroyed='".$else['Destroyed']."', Placed='".$else['Placed']."' WHERE UUID='steve' AND blockID='".$else['blockID']."'");
} 

[rmkilc]

It worked great! I modified it a bit but this got me through.