SELECT
 AGE_NAME,
 SUM(CASE WHEN TIME_NAME = '5時間未満' THEN 1 ELSE 0 END) AS '5時間未満',
 SUM(CASE WHEN TIME_NAME = '5時間以上6時間未満' THEN 1 ELSE 0 END) AS '5時間以上6時間未満',
 SUM(CASE WHEN TIME_NAME = '6時間以上7時間未満' THEN 1 ELSE 0 END) AS '6時間以上7時間未満',
 SUM(CASE WHEN TIME_NAME = '7時間以上8時間未満' THEN 1 ELSE 0 END) AS '7時間以上8時間未満',
 SUM(CASE WHEN TIME_NAME = '8時間以上9時間未満' THEN 1 ELSE 0 END) AS '8時間以上9時間未満',
 SUM(CASE WHEN TIME_NAME = '9時間以上' THEN 1 ELSE 0 END) AS '9時間以上',
 SUM(CASE WHEN TIME_NAME = '不詳' THEN 1 ELSE 0 END) AS '不詳'
FROM
 SLEEP_TIME_DTL
LEFT JOIN
 SLEEP_TIME
USING
 (TIME_CODE)
LEFT JOIN
 AGE_GRP
USING
 (AGE_CODE)
GROUP BY
 AGE_NAME