On Thu, Oct 20, 2005 at 03:57:41PM +0900, Michael Glaesemann wrote:
> On Oct 20, 2005, at 15:44 , Michael Fuhr wrote:
> > expression IS DISTINCT FROM expression
> >
> > For non-null inputs this is the same as the <> operator. However,
> > when both inputs are null it will return false, and when just one
> > input is null it will return true. Thus it effectively acts as
> > though null were a normal data value, rather than "unknown".
>
> Interesting! Thanks, Michael. You don't happen to know off the top of
> your head if that's standard SQL, do you?
IS DISTINCT FROM is defined in SQL:1999 and SQL:2003.
--
Michael Fuhr