--10进制dba
select dbms_utility.data_block_address_block(4194432) "blick", 
 dbms_utility.data_block_address_file(4194432) "file" from dual;

--16进制
set serveroutput on
declare
   p_dba   VARCHAR2 (255) :='0x00800212';
   l_str   VARCHAR2 (255) DEFAULT NULL;
BEGIN
    l_str :=
         'datafile# is:'
      || DBMS_UTILITY.data_block_address_file (TO_NUMBER (LTRIM (p_dba, '0x'),'xxxxxxxx'))
      || chr(10)||'datablock is:'
      || DBMS_UTILITY.data_block_address_block (TO_NUMBER (LTRIM (p_dba, '0x'),'xxxxxxxx'));
   dbms_output.put_line(l_str);
END;

10/16进制互转

--10 to 16
select to_char(2147510731,'xxxxxxxxxxx') from dual;
--16 to 10
select to_number('800069c8','xxxxxxxxxxx') from dual;