What is the lowest of  Episode Number that has a Air Date on 20 july 2007?
CREATE TABLE table_name_79 (episode_number INTEGER, air_date VARCHAR)
SELECT MIN(episode_number) FROM table_name_79 WHERE air_date = "20 july 2007"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_name_79 (episode_number INTEGER, air_date VARCHAR) Question: What is the lowest of  Episode Number that has a Air Date on 20 july 2007? [/INST] SELECT MIN(episode_number) FROM table_name_79 WHERE air_date = "20 july 2007" </s>