Find all the zip codes in which the max dew point have never reached 70.
CREATE TABLE weather (zip_code VARCHAR, max_dew_point_f VARCHAR)
SELECT DISTINCT zip_code FROM weather EXCEPT SELECT DISTINCT zip_code FROM weather WHERE max_dew_point_f >= 70
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: 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. [/INST] SELECT DISTINCT zip_code FROM weather EXCEPT SELECT DISTINCT zip_code FROM weather WHERE max_dew_point_f >= 70 </s>