SELECT user_profile.device_id, university, SUM(IF(MONTH(date) = 8,1,0)) AS question_cnt, SUM(IF(result = 'right' AND MONTH(date) = 8,1,0)) AS right_question_cnt FROM user_profile LEFT JOIN question_practice_detail ON user_profile.device_id = question_practice_detail.device_id WHERE user_profile.univ...