function str_to_base64

function str_to_base64(
    p_str in varchar2
) return varchar2

encode string using base64

function clob_to_base64

function clob_to_base64(
    p_clob in clob
) return clob

encode clob using base64

function blob_to_base64

function blob_to_base64(
    p_blob in blob
) return clob

encode blob using base64

function base64_to_str

function base64_to_str(
    p_str in varchar2
) return varchar2

decode base64-encoded string

function base64_to_clob

function base64_to_clob(
    p_clob in varchar2
) return clob

decode base64-encoded clob

function base64_to_blob

function base64_to_blob(
    p_clob in clob
) return blob

decode base64-encoded clob to blob