UPDATE HOSPITALIZATION
SET INP_YES =  FLOOR(cast(INP_YES AS float)/(INP_YES+INP_NO+UNIDENTIFIED)*100);
SELECT PREFECTURE.PF_CODE AS 都道府県コード, PF_NAME AS 都道府県名, INP_YES AS 入院率
FROM PREFECTURE
JOIN HOSPITALIZATION ON PREFECTURE.PF_CODE = HOSPITALIZATION.PF_CODE
ORDER BY INP_YES DESC,PREFECTURE.PF_CODE ASC