On Sun, Sep 19, 2010 at 6:33 PM, Simon Slavin <slav...@bigfraud.org> wrote:

>
> On 19 Sep 2010, at 8:42pm, Florian Weimer wrote:
>
> > In standard SQL, you cannot write
> >
> >  expr1 IS expr2
>
> How does this differ from
>
> (expr1) = (expr2)
>

If expr1 and expr2 both evaluate to NULL then (expr1) IS (expr2) is true but
(expr1)=(expr2) is NULL.



>
> ?
>
> Simon.
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-- 
D. Richard Hipp
d...@sqlite.org
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