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  3. October 2008

RE: Interesting question and debate on ddl tables with datefieldsthatwill not always have a value

One thing that was ignored on his response was
<snip>
And a big difference if you use Relational Integrity. Nulls don't need to
be in the parent table, markers requiere a special record, that needs to
be ommited in all queryes...
</snip>

For example, on an order line file. If you set up RI on the order line to
the item master, and you don't use nulls, then you have to have dummy item
numbers out there for "special charge" and all that rot. However, if you
define a null on the item number then you're fine.
Seems to be a management fad right now to reduce the number of items in
the item file.

But probably most of the anti null crowd wouldn't touch RI to save their
souls.

Rob Berendt

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