Question

I’ve found myself somewhat improbably* needing to round to the nearest ODD integer in SQL. There’s a nice solution for how to round to the nearest N (2,5,10,etc) here, but nothing explicitly on odd numbers. Using Oracle 11gR2, if there are solutions particular to Oracle out there.

*Need to join my data to tables stripped from this study. The authors used a consistent bin width of 2…but sometimes it’s even, and others it’s odd.

Answer 1

Here is an oracle PL/SQL Function that would do that:

CREATE OR REPLACE FUNCTION ROUNDODD 
(
  IMPNUM IN NUMBER  
) RETURN NUMBER AS
roundnum number;
oddnum number;
BEGIN
roundnum := round (IMPNUM,0);

IF mod(roundnum,2) = 1
THEN RETURN roundnum;
ELSE
IF roundnum > IMPNUM
THEN RETURN roundnum-1;
ELSE RETURN roundnum+1;
end if;
end if;
END ROUNDODD;