SELECT
    EMP_CODE AS CODE,
    EMP_LAST_NAME AS SURNAME,
    EMP_FIRST_NAME AS NAME
FROM
    EMP
WHERE
    VALID_FLG = '1'
    AND REPLACE (EMP_LAST_NAME || EMP_FIRST_NAME, ' ', '') IN (
        SELECT
            REPLACE (EMP_LAST_NAME || EMP_FIRST_NAME, ' ', '') AS EMP_NAME
        FROM
            EMP
        WHERE
            VALID_FLG = '1'
        GROUP BY
            EMP_NAME
        HAVING
            COUNT(*) >= 2
    )
ORDER BY
    REPLACE (EMP_LAST_NAME || EMP_FIRST_NAME, ' ', '') ASC,
    EMP_CODE ASC;