select t1.tag, exam_cnt_20,exam_cnt_21, concat(round((exam_cnt_21-exam_cnt_20)*100/exam_cnt_20,1),'%') as growth_rate, rank_20 as exam_cnt_rank_20, rank_21 as exam_cnt_rank_21, cast(rank_21 as signed)-cast(rank_20 as signed) as rank_delta from ( select tag,exam_cnt_20, ...