>>PKs are used to enforce referential integrity so they only have to be unique. Where they are generated is a different issue. Right?
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>I guess that's a matter of opinion.
They are clearly two different tasks, but I'll let you off the hook. ;) Here's some food for thought, though. If natural keys are used they certainly would exceed 16 bytes after a child table. So guids are better than natural keys even for joins.
Here's a way to offset some of the performance issues.
http://www.informit.com/articles/article.asp?p=25862Thanks for your time!
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>>Integer performance is good, but why does SQL's newid function generate guids?
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>That's a question for the SQL Server team.
