text: Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
  ### Context:
  CREATE TABLE weather (zip_code VARCHAR, max_dew_point_f VARCHAR)
  ### Question:
  Find all the zip codes in which the max dew point have never reached 70.
  ### Answer:
  SELECT DISTINCT zip_code FROM weather EXCEPT SELECT DISTINCT zip_code FROM weather WHERE max_dew_point_f >= 70