SQL - Encode/decode function (base64)

set define off;

- Encode

SELECT UTL_RAW.cast_to_varchar2(
  UTL_ENCODE.base64_encode(
  UTL_RAW.cast_to_raw('Surf the world, travel & eat as much as u can... xo xo T.'))) "42"
FROM dual;

- Decode

SELECT UTL_RAW.cast_to_varchar2(
  UTL_encode.base64_decode(
  UTL_RAW.cast_to_raw('U3VyZiB0aGUgd29ybGQsIGxvdmUgdGhlIHdvbWVuLCBlYXQgYXMgbXVjaCBhcyB1IGNhbi4uLiB4byB4byBULg=='))) "42"
FROM dual;