what is the prod.code of the episode with original air date 01/12/1968?
CREATE TABLE table_13403120_1 (prodcode VARCHAR, originalairdate VARCHAR)
SELECT COUNT(prodcode) FROM table_13403120_1 WHERE originalairdate = "01/12/1968"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_13403120_1 (prodcode VARCHAR, originalairdate VARCHAR) Question: what is the prod.code of the episode with original air date 01/12/1968? [/INST] SELECT COUNT(prodcode) FROM table_13403120_1 WHERE originalairdate = "01/12/1968" </s>