How many dates did the episode with a production code of 804 originally air on?
CREATE TABLE table_27988559_1 (original_air_date VARCHAR, production_code VARCHAR)
SELECT COUNT(original_air_date) FROM table_27988559_1 WHERE production_code = 804
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_27988559_1 (original_air_date VARCHAR, production_code VARCHAR) Question: How many dates did the episode with a production code of 804 originally air on? [/INST] SELECT COUNT(original_air_date) FROM table_27988559_1 WHERE production_code = 804 </s>