SELECT tag,exam_cnt_20,exam_cnt_21,CONCAT(ROUND((exam_cnt_21-exam_cnt_20)/exam_cnt_20*100,1),'%') growth_rate,dr2020 exam_cnt_rank_20,dr2021 exam_cnt_rank_21,dr2021-dr2020 rank_delta FROM ( SELECT tag,count(submit_time) exam_cnt_21,ROW_NUMBER() over(ORDER ...