sql server - Sum() column X, but add column Y only once

Posted by Aseem Gautam on Stack Overflow See other posts from Stack Overflow or by Aseem Gautam
Published on 2010-04-14T17:39:31Z Indexed on 2010/04/14 17:43 UTC
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My table is like this

A X Y
1 2 3
1 4 3
2 9 1
2 7 1

What I want is to sum X column with Group By A but add Y only once. The values in column Y are always same for a specific A.

When I run this:

SELECT SUM(X) FROM TABLE GROUP BY A

It gives me: 12, 19. But I need 9, 18.

Thanks.

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