How many different classes are there?
CREATE TABLE CLASS (
    class_code VARCHAR
)
SELECT COUNT(DISTINCT class_code) FROM CLASS
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: How many different classes are there? ### Input: CREATE TABLE CLASS (
    class_code VARCHAR
) ### Response: SELECT COUNT(DISTINCT class_code) FROM CLASS