How to get group-wise correlation in SAS?

My data somewhat looks like this:

Product Attribute1 Attribute2 P1 1 -1 P1 1 -1 P1 1 -1 P1 1 -1 P1 1 -1 P2 1 1 P2 1 1 P2 1 1 P2 1 1 P2 1 1 . . .

Now I need to find out the correlation between attribute1 and attribute2 for each product individually. My actual data set contains around 100 products. Hence my output should be somewhat like this" Product Correlation P1 -1 P2 1 . . . How will I go about that in SAS/SQL?