oracle foreign-key question

Michael A. Cleverly michael at cleverly.com
Tue Aug 22 19:34:46 MDT 2006


On 8/22/06, Jonathan Ellis <jonathan at carnageblender.com> wrote:

> A simpler CHECK would be (user_id is null != visitor_id is null).

That isn't valid Oracle syntax (at least in 9i).

Michael



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