SELECT tag, exam_cnt_20, exam_cnt_21, CONCAT(round((exam_cnt_21-exam_cnt_20)/exam_cnt_20*100,1),"%") as growth_rate, exam_cnt_rank_20, exam_cnt_rank_21, exam_cnt_rank_21-exam_cnt_rank_20 as rank_delta from( SELECT tag, SUM(IF(start_year=2020,exam_cnt,null)) as exam_cnt_20, SUM(IF(start_year=2021,exa...