We already have plenty of professional organizations (IEEE-CS, ACM, DPMA, etc), but their mission is not in line with a labor union. Unions function because they have the clout of...

webrunner (12/11/2007)

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I guess I am still unclear about the definition of PK here, not the fact of how PKs are implemented (or may be wrongly implemented) in real database systems.

My...

James Goodwin (12/11/2007)

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Assignments does not need a PK since it will never be a FK...

webrunner (12/11/2007)

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Wait, I just want to clarify - by confusion do you mean my post about the duplicate rows error in Enterprise Manager?

I thought the purpose of a PK...

Classic confusion of keys vs. indices. The purpose of a PK is to provide referential integrity; access is provided by an index. One simple case where a PK is not...