Steve Jones - Editor (8/18/2010)
It could be N/A, but that implies a specific meaning. Using NULL there as a placeholder works, but you are assigning a value to NULL. I prefer to keep it as "unknown" as in there will be a ship date, but right now it's unknown.
100% in agreement. That pretty much summarizes my position on the issue.
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Pablo (Paul) Berzukov
Author of Understanding Database Administration available at Amazon and other bookstores.
Disclaimer: Advice is provided to the best of my knowledge but no implicit or explicit warranties are provided. Since the advisor explicitly encourages testing any and all suggestions on a test non-production environment advisor should not held liable or responsible for any actions taken based on the given advice.