jQuery .click功能不起作用？

Question

我有一个javaScript文件，其中我试图通过使用jQuery绑定一个名为change的函数我尝试了这段代码，但它无法正常工作？

SELECT  ce.email, ce.number_of_contacts
FROM (
    SELECT email, COUNT(id) AS number_of_contacts
   FROM contacted_emails
   GROUP BY email
   HAVING number_of_contacts > 3
) AS ce
NATURAL LEFT JOIN blacklist AS bl
NATURAL LEFT JOIN submission_authors AS sa
NATURAL LEFT JOIN users AS u
WHERE bl.email IS NULL AND sa.email IS NULL AND u.email IS NULL

请帮我解释为什么我的代码无效？