SELECT  std.AGE_CODE AS '年齢コード'
  ,ag.AGE_NAME AS '年齢階層名'
  ,SUM(std.SP_TIME_5) AS '5時間未満'
  ,SUM(std.SP_TIME_6) AS '5時間以上6時間未満'
  ,SUM(std.SP_TIME_7) AS '6時間以上7時間未満'
  ,SUM(std.SP_TIME_8) AS '7時間以上8時間未満'
  ,SUM(std.SP_TIME_9) AS '8時間以上9時間未満'
  ,SUM(std.SP_TIME_9OVER) AS '9時間以上'
FROM SLEEP_TIME_DTL std
  INNER JOIN AGE_GRP ag ON std.AGE_CODE = ag.AGE_CODE
  INNER JOIN PREFECTURE p ON std.PF_CODE = p.PF_CODE
WHERE 
  p.PF_NAME IN ('北海道','青森県','岩手県','宮城県','福島県')
GROUP BY std.AGE_CODE, ag.AGE_NAME
ORDER BY std.AGE_CODE