Decimal to Binary

Question

Hi,
Can we convert decimal values stored in a column to binary using select statement?
Has Oracle 10g any built-in function that supports such conversions.

Answer 1

and of course an example using the model clause ;-)
SQL> create table numbers
  2  as
  3  select 0 n from dual union all
  4  select 1 from dual union all
  5  select 2 from dual union all
  6  select 15 from dual union all
  7  select 16 from dual union all
  8  select 21 from dual union all
  9  select 1023 from dual union all
10  select 1024 from dual union all
11  select 3571 from dual
12  /
Tabel is aangemaakt.
SQL> select a n
  2       , to_number(b) binary
  3    from numbers
  4   model
  5         partition by (n a)
  6         dimension by (0 i)
  7         measures (n, cast(null as varchar2(4000)) b)
  8         rules iterate(20)
  9         ( b[0] = b[0] || case when n[0] >= power(2,19-iteration_number) then '1' else '0' end
10         , n[0] = n[0] - case when n[0] >= power(2,19-iteration_number) then power(2,19-iteration_number) else 0 end
11         )
12   order by n
13  /
                   N               BINARY
                   0                    0
                   1                    1
                   2                   10
                  15                 1111
                  16                10000
                  21                10101
                1023           1111111111
                1024          10000000000
                3571         110111110011
9 rijen zijn geselecteerd.Regards,
Rob.