doing a SQL sum and getting the result into rails

All,

I am trying to execute the following SQL code and have the result
returned to my application for further proessing...

"select SUM(action) as 'sum' from approvals where upload_id = ?",
@upload.id

I have tried this in a Approval.find_by_sql also as a
Approval.connection.execute, but I can't seem to get the data back
into rails... How can I access the returned data, which should be a
single number? I tried @points.sum, @points, etc. I want to do some
numerical comparisons on this, so I need the number, and just the
number.

Oh, and `action` can be any number from -3 to 3, so I can't just do a
count...

Any ideas?

Thanks!