Rounding down using the floor function

Question

I need some help rounding down to the nearest 5 using the floor function.
My code appears to be correct but I'm not getting the wrong result.
create or replace
TRIGGER "SALE_CALC" BEFORE
INSERT OR
UPDATE ON Prs FOR EACH Row
BEGIN
:New.Prsvf9c := (floor((:New.Prsprsc - :new.prsvf1c)/5)*5);
END;
*:New.Prsprsc = 100.00 and :new.prsvf1c = 46.00*
After the trigger executes I get a result of *54.00*, which is the result before the rounding should take place. The result should be *50.00!*
What am I doing wrong?

Answer 1

The code you posted appears to produce the results you expect if the data is what you say it is
SQL> create table prs(
  2    Prsvf9c number,
  3    Prsprsc number,
  4    prsvf1c number
  5  );
Table created.
SQL> create or replace
  2  TRIGGER "SALE_CALC" BEFORE
  3  INSERT OR
  4  UPDATE ON Prs FOR EACH Row
  5  BEGIN
  6
  7  :New.Prsvf9c := (floor((:New.Prsprsc - :new.prsvf1c)/5)*5);
  8
  9  END;
10  /
Trigger created.
SQL> insert into prs( Prsprsc , prsvf1c )
  2    values( 100, 46 );
1 row created.
SQL> select * from prs;
   PRSVF9C    PRSPRSC    PRSVF1C
        50        100         46If you're seeing something different, it would be very helpful if you did something like I did here and post a reproducible test case.
Incidentally, I'm not sure why you would have columns named prsvf1c and Prsvf9c but if that implies that you've denormalized your table to store 9 values rather than creating a child table with up to 9 rows, that's unlikely to be a reasonable solution.
Justin