Hi,

>1. Return a list of all User objects meeting a given criteria along
>with a field that is a sum of all their order totals.
>  
>
You want to create another class and mapper, UserWithSum (or a 
friendlier name) that maps to an arbitrary select.
http://www.sqlalchemy.org/docs/04/mappers.html#advdatamapping_mapper_selects

>2. Find all users in a given state (User.c.state == "NY") with their
>sum of all order totals being greater then some number X.
>  
>
Once you've achieved 1, this is pretty straightforward.

Paul

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