解答
177
SQL文(クエリ)
SELECT user_id , SUM(cv) cv_by_user FROM ( SELECT user_id , CONCAT(cid, session_count) AS session , MAX(IF(page = "/thank_you/", 1, 0)) AS cv FROM sample.web_log GROUP BY user_id , session ) GROUP BY user_id HAVING user_id IS NOT NULL AND cv_by_user > 1 ORDER BY 1