SELECT DH.PF_CODE AS CODE , P.PF_NAME AS NAME,
ROUND(100.0*SUM(CASE DH.CATEGORY_CODE WHEN '120' THEN DH.AMT ELSE 0 END)/
SUM(CASE DH.CATEGORY_CODE WHEN '110' THEN DH.AMT ELSE 0 END),1
) AS PERCENTAGE 
FROM DRINK_HABITS DH
INNER JOIN PREFECTURE P ON DH.PF_CODE = P.PF_CODE
WHERE DH.GENDER_CODE IN (2,3)
GROUP BY DH.PF_CODE
ORDER BY PERCENTAGE DESC, DH.PF_CODE;