What is the total number of production code listings of episodes written by Matthew Lau?
CREATE TABLE table_27116696_1 (production_code VARCHAR, written_by VARCHAR)
SELECT COUNT(production_code) FROM table_27116696_1 WHERE written_by = "Matthew Lau"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_27116696_1 (production_code VARCHAR, written_by VARCHAR) Question: What is the total number of production code listings of episodes written by Matthew Lau? [/INST] SELECT COUNT(production_code) FROM table_27116696_1 WHERE written_by = "Matthew Lau" </s>