def order_by_as_sql(self):
return comma_join([<EOL>'<STR_LIT>' % field[<NUM_LIT:1>:] if field[<NUM_LIT:0>] == '<STR_LIT:->' else field<EOL>for field in self._order_by<EOL>])<EOL>
Returns the contents of the query's `ORDER BY` clause as a string.