(self)
Returns a list of Column objects. These are used to
        make up the from portion of the SQL query.
Returns a list of Column objects. These are used to
        make up the from portion of the SQL query.
Returns a list of Column objects . These are used to make up the from portion of the SQL query .
def columns(self):
        """
        Returns a list of Column objects. These are used to
        make up the from portion of the SQL query.
        """
        raise NotImplementedError()
def columns ( self ) : raise NotImplementedError ( )