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