SELECT
  prf.PF_CODE as 都道府県コード,
  prf.PF_NAME as 都道府県名,
  round(100 * cast(hsp.INP_YES as real) / cast((hsp.INP_YES + hsp.INP_NO + hsp.UNIDENTIFIED) as real), 1) as 入院率
FROM
  PREFECTURE prf
INNER JOIN
  HOSPITALIZATION hsp
ON
  prf.PF_CODE = hsp.PF_CODE