What is the total number of titles written by Casey Johnson?
CREATE TABLE table_12419515_4 (title VARCHAR, written_by VARCHAR)
SELECT COUNT(title) FROM table_12419515_4 WHERE written_by = "Casey Johnson"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_12419515_4 (title VARCHAR, written_by VARCHAR) Question: What is the total number of titles written by Casey Johnson? [/INST] SELECT COUNT(title) FROM table_12419515_4 WHERE written_by = "Casey Johnson" </s>