FUNCTION DEC_TO( p_decimal number,
p_base pls_integer,
p_tamanho pls_integer default 2 ) return varchar2 is -- conversao de bases: decimal para qualquer base

sRetorno varchar2(50);
sRESTO varchar2(50);
nQUOC number;
nRESTO pls_integer;
nTam pls_integer;
--
begin
nQUOC  := p_decimal;
sRESTO := '';

if nQUOC = 0 then
   sRetorno := '0';
   goto fim;
end if;

while nQUOC > 0 loop
   if nQUOC > 1 then
      nRESTO := MOD( nQUOC, p_base );
      nQUOC := TRUNC( nQUOC/p_base );
   else
      nRESTO := 1;
      nQUOC := 0;
   end if;
   if nResto < 10 then
      sRESTO := sRESTO || to_char(nRESTO);
   else
      sRESTO := sRESTO || chr(65+nResto-10);
   end if;
end loop;

sRetorno := '';
nTam := LENGTH( sRESTO );

for i in 0..nTam-1 loop
   sRetorno := sRetorno || substr( sRESTO, nTam-i, 1 );
end loop;

<<fim>>
return ( LPAD( sRetorno, p_tamanho, '0' ) );

end dec_to;