SELECT
    EMP_CODE AS CODE,
    CASE
        WHEN EMP_KANA_NAME LIKE '%\_%' ESCAPE '\' THEN
            '''' || REPLACE(EMP_KANA_NAME, '_', '') || ''''
        ELSE
            '''' || EMP_KANA_NAME || ''''
    END AS KANA_NAME
FROM
    EMP
WHERE
    EMP_KANA_NAME LIKE '%\_%' ESCAPE '\'
ORDER BY
    EMP_CODE DESC;