-- 各年齢階層ごとに、異なる時間範囲の睡眠時間の人数を集計する
SELECT 
    AGE_GRP.AGE_NAME AS 年齢階層,
    -- 各TIME_CODEの条件が満たされないときは0を出力する
    SUM(CASE WHEN TIME_CODE = 120 THEN TARGET_POP ELSE 0 END) AS "5時間未満",
    SUM(CASE WHEN TIME_CODE = 130 THEN TARGET_POP ELSE 0 END) AS "5時間以上6時間未満",
    SUM(CASE WHEN TIME_CODE = 140 THEN TARGET_POP ELSE 0 END) AS "6時間以上7時間未満",
    SUM(CASE WHEN TIME_CODE = 150 THEN TARGET_POP ELSE 0 END) AS "7時間以上8時間未満",
    SUM(CASE WHEN TIME_CODE = 160 THEN TARGET_POP ELSE 0 END) AS "8時間以上9時間未満",
    SUM(CASE WHEN TIME_CODE = 170 THEN TARGET_POP ELSE 0 END) AS "9時間以上",
    SUM(CASE WHEN TIME_CODE = 180 THEN TARGET_POP ELSE 0 END) AS 不詳
FROM
    SLEEP_TIME_DTL
    INNER JOIN AGE_GRP
        ON SLEEP_TIME_DTL.AGE_CODE = AGE_GRP.AGE_CODE
GROUP BY
    AGE_GRP.AGE_CODE
ORDER BY
    AGE_GRP.AGE_CODE;