On Sun, Dec 20, 2015 at 11:39 PM, Sterpu Victor <vic...@caido.ro> wrote:
> Thank you.
>
> I used the syntax with 2 indexes, it works for me.
> But why does NULL != NULL?

Because NULL literally means "an unknown, possibly unknowable value."

You need to stop thinking of NULL as A value. It is not.


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