--【問題2】睡眠時間帯別集計
select
    AGE_CODE as 年齢コード,
    AGE_NAME as 年齢階層名,
    sum(SP_TIME_5) as "5時間未満",
    sum(SP_TIME_6) as "5時間以上6時間未満",
    sum(SP_TIME_7) as "6時間以上7時間未満",
    sum(SP_TIME_8) as "7時間以上8時間未満",
    sum(SP_TIME_9) as "8時間以上9時間未満",
    sum(SP_TIME_9OVER) as "9時間以上"
from
    SLEEP_TIME_DTL
    inner join AGE_GRP using(AGE_CODE)
    inner join PREFECTURE using(PF_CODE)
where
    PF_NAME in ("北海道", "青森県", "岩手県", "宮城県", "福島県")
group by
    AGE_CODE
order by
    年齢コード;