How to obtain the integer and fractional parts of a number ?

Question

Good morning,
given the value:
5433.43567
I'd like to know if there is a function such that
f(5433.43567) = 5433
and another such that
f2(5433.43567) = 0.43567Without any rounding, truncation or other "special effects" ;). I can synthesize those functions using to_char, string manipulation and to_number but I'd like to make sure that I didn't miss a simpler way or, a combination of those functions that is really simple (the stuff I've come up with is hardly simple :( )
Thank you for your help,
John.

Answer 1

440bx - 11gR2 wrote:
Good morning BluShadow, Afternoon! :)
select regexp_substr(.43567, '[^.]+', 1, 1) as whole_part
,regexp_replace(5433, '[^.]+\.(.*)$', '0.\1') as fract_part
from dual;
The result should be 0 (or blank).
SQL> ed
Wrote file afiedt.buf
  1  with t as (select 5433.43567 as num from dual union all
  2             select 0.43567 from dual union all
  3             select 5433 from dual)
  4  select num
  5        ,regexp_substr(num, '^[^.]+') as whole_part_string
  6        ,regexp_substr(num, '\.[^.]+$') as fract_part_string
  7        ,trunc(num) as whole_part_number
  8        ,num-trunc(num) as fract_part_number
  9* from t
SQL> /
       NUM WHOLE_PART_STRING                        FRACT_PART_STRING                        WHOLE_PART_NUMBER FRACT_PART_NUMBER
5433.43567 5433                                     .43567                                             5433               .43567
    .43567                                          .43567                                                0               .43567
      5433 5433                                                                                        5433                    0
SQL>Personally, I'd just stick with the number variants using trunc. Far simpler to use and you're still dealing with numbers.