How many original air dates were there for the episode with production code 212?
CREATE TABLE table_23937219_3 (original_air_date VARCHAR, prod_code VARCHAR)
SELECT COUNT(original_air_date) FROM table_23937219_3 WHERE prod_code = 212
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_23937219_3 (original_air_date VARCHAR, prod_code VARCHAR) Question: How many original air dates were there for the episode with production code 212? [/INST] SELECT COUNT(original_air_date) FROM table_23937219_3 WHERE prod_code = 212 </s>