How many years was Louis Armstrong performing?
CREATE TABLE table_name_51 (
    year VARCHAR,
    performer_s_ VARCHAR
)
SELECT COUNT(year) FROM table_name_51 WHERE performer_s_ = "louis armstrong"
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 years was Louis Armstrong performing? ### Input: CREATE TABLE table_name_51 (
    year VARCHAR,
    performer_s_ VARCHAR
) ### Response: SELECT COUNT(year) FROM table_name_51 WHERE performer_s_ = "louis armstrong"