[web2py] query

[luifran]

I have the following query:
usuarios_in=db(db.auth_membership.user_id==db.auth_user.id).select(db.auth_user.username)
#This show users in membership
I have show users out of membership with the following query:
usuarios_out=db(db.auth_membership.user_id!
=db.auth_user.id).select(db.auth_user.username)
This is correct?
Not work fine to me.