select utl_raw.cast_to_varchar2(utl_encode.base64_encode(utl_raw.cast_to_raw('123456'))) from dual; select utl_raw.cast_to_varchar2(utl_encode.base64_decode(utl_raw.cast_to_raw('MTIzNDU2'))) from dual
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转载于:https://www.cnblogs.com/Linger-wj/p/9565928.html