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Home -> Community -> Usenet -> comp.databases.theory -> Re: c.d.theory glossary - NULL
"Alfredo Novoa" <alfredo_at_ncs.es> wrote in message
news:408ec600.632719_at_news.wanadoo.es...
> The zero byte is at the physical level and the null at the logical
> level.
...
> The bit vector is at the physical level and the SQL nulls at the
> logical level.
In this case, it's a distinction without a difference. When the program
that does a SELECT
receives a NULL through the SQL interface, that NULL came from somewhere.
I'm telling you
where the data that gave rise to the NULL was stored.
Received on Wed Apr 28 2004 - 07:45:38 CDT
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