On Aug 24, 2007, at 10:43 AM, Curtis Scheer wrote:

> What is the syntax to specify the columns in a generative query?
>
>
>
>     q = session.query(Foo)
>
>     q = q.group_by([foo_table.c.description])
>
>
>
>     for currow in q:
>
>             print currow
>
>
>
> This query selects all the columns in the Foo table, wondering how  
> to specify the columns to select.

query(Foo) will always select all columns that correspond to a "Foo"  
object.  for individual columns, use a SQL expression instead of a  
Query, i.e. select([foo_table.c.cola, foo_table.c.colb]).group_by 
(...).where(...).<etc>() .
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