How many points numbers had a class of 250cc, a year prior to 1978, Yamaha as a team, and where wins was more than 0?
CREATE TABLE table_name_19 (
    points VARCHAR,
    wins VARCHAR,
    team VARCHAR,
    class VARCHAR,
    year VARCHAR
)
SELECT COUNT(points) FROM table_name_19 WHERE class = "250cc" AND year < 1978 AND team = "yamaha" AND wins > 0
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 points numbers had a class of 250cc, a year prior to 1978, Yamaha as a team, and where wins was more than 0? ### Input: CREATE TABLE table_name_19 (
    points VARCHAR,
    wins VARCHAR,
    team VARCHAR,
    class VARCHAR,
    year VARCHAR
) ### Response: SELECT COUNT(points) FROM table_name_19 WHERE class = "250cc" AND year < 1978 AND team = "yamaha" AND wins > 0