math - 10進数を2進数に変換するには?

Question

10進数の「18.25」を2進数に変換するには？小数点 .25 で混乱してしまいました。

Answer 1

with recursiveCTE(num) as (
  select &EnterNum num from dual
  union all
  select trunc(num/2) from recursiveCTE
  where trunc(num/2)> 0
),
ref as (SELECT num, mod(num, 2) bin_remainder from recursiveCTE)
select reverse(to_char(replace(wm_concat(bin_remainder), ','))) binary_num from ref;