Ged Byrne schrieb:
> Alex,
>
> This all makes sense, but this is not how NULLs work in SQL databases.
>
> NULL behaves the way that you describe UNKNOWN.
>
> The scheme you describe could be implemented using the special values
> approah.
That is bad! From other posts I also made a conclusion that there is
almost complete chaos in this area because different SQLs and DBMSs
implement it differently and even in theory there is no unity how to
treat it.
--
alex
http://conceptoriented.com
Received on Wed Jun 08 2005 - 08:11:26 CDT
