[web2py] Re: How to select(count<1, groupby=db.person) or how to find persons with no dogs/less than x dogs.

[François Delpierre]

Excellent !!
That did it.
Thanks a lot.
It would be very nice to have a wiki with all the samples for the DAL. I 
did found this one :
http://web2py.wordpress.com/2010/05/23/some-tricks-to-use-when-dealing-with-databases/
but it didn't help me. I was not thinking about the negation.

Thanks,

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