Edmund Dengler wrote:
> The problem I would face is that this still needs to be a sequential scan
> in the table rather than an index lookup.
IIRC, NULL values aren't indexed, only actual values, which is an
implementation detail but yet-another reason why NULL-elimination
through normalization is a good idea:
http://www.hughdarwen.freeola.com/TheThirdManifesto.web/Missing-info-without-nulls.pdf
Mike Mascari
mascarm@mascari.com
