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This should be easy. In MySQL I could just do:
select sum(column1*column2) as sum1 from table
How do you do this in Rails with sqlite? I’ve tried find_by_sql with the exact query above, as well as find(:all, :select=>…), and all sorts of other things, but none return the proper value. Most are just blank, like this:
[#<Element> ]
I could loop through, pull out values, and then sum, but it seems absurd to have to do that.
Can someone point me to what I’m obviously missing? Thanks!
http://ar.rubyonrails.org/classes/ActiveRecord/Calculations/ClassMethods.html