How many different episode numbers are there for episodes directed by Wayne Rose?
CREATE TABLE table_21696800_1 (_number VARCHAR, directed_by VARCHAR)
SELECT COUNT(_number) FROM table_21696800_1 WHERE directed_by = "Wayne Rose"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_21696800_1 (_number VARCHAR, directed_by VARCHAR) Question: How many different episode numbers are there for episodes directed by Wayne Rose? [/INST] SELECT COUNT(_number) FROM table_21696800_1 WHERE directed_by = "Wayne Rose" </s>