WITH RANKED_HOUSE AS (
    SELECT
        CLASS_NAME
        ,PERSON_NAME
        ,MAX(AMT) AS AMT
        ,RANK() OVER(PARTITION  BY CLASS_NAME ORDER BY AMT DESC) AS AMT_RANK
    FROM HOUSEHOLD
    WHERE CLASS_CODE != '01'
        OR PERSON_CODE != '1'
    GROUP BY CLASS_NAME, PERSON_NAME
)
SELECT
    CLASS_NAME AS CLASS
    ,PERSON_NAME AS PERSON
    ,AMT AS HOUSEHOLDS
FROM RANKED_HOUSE
WHERE AMT_RANK = 1;