SELECT 
    MEMBER_CODE AS MEMBER,
    EMAIL,
    SUBSTR(
        SUBSTR(EMAIL, INSTR(EMAIL, '@') + 1),
        1,
        LENGTH(SUBSTR(EMAIL, INSTR(EMAIL, '@') + 1)) - LENGTH('.co.jp')
    ) AS DOMAIN
FROM 
    MEMBER_MST
ORDER BY 
    DOMAIN DESC,
    MEMBER DESC;