How many different production codes does the episode directed by Dominic Polcino have?
CREATE TABLE table_20613292_1 (production_code VARCHAR, directed_by VARCHAR)
SELECT COUNT(production_code) FROM table_20613292_1 WHERE directed_by = "Dominic Polcino"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_20613292_1 (production_code VARCHAR, directed_by VARCHAR) Question: How many different production codes does the episode directed by Dominic Polcino have? [/INST] SELECT COUNT(production_code) FROM table_20613292_1 WHERE directed_by = "Dominic Polcino" </s>