select 
P.PF_CODE 都道府県コード,
PF_NAME 都道府県名,
ROUND(100.0 * INP_YES / (UNIDENTIFIED + INP_YES + INP_NO), 2) 入院率
from 
PREFECTURE P JOIN HOSPITALIZATION H 
where PF_NAME is not null 
order by 入院率 desc
;