select t.job, t.first_year_mon, t.first_year_cnt, t.second_year_mon, t.second_year_cnt from( select t.job, substr(t.mon,6,7) as mon, max(t.first_year_mon) as first_year_mon, max(t.first_year_cnt) as first_year_cnt, max(t.second_year_mon) as second_year_mon, max(t.second_year_cnt) as second_year_cnt ...