SELECT
    CLASS_NAME AS CLASS
,   PERSON_NAME AS PERSON
,   MAX(AMT) AS HOUSEHOLDS
FROM
    HOUSEHOLD
WHERE
    PERSON_CODE <> '1'
AND CLASS_CODE <> '01'
AND CLASS_NAME IS NOT NULL
AND PERSON_NAME IS NOT NULL
AND AMT IS NOT NULL
GROUP BY
    CLASS_NAME
ORDER BY
    CLASS_CODE ASC