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Message Posted: Wed, 24 Sep 2003 @ 21:24:03 GMT

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Teradata does not use Primary KEYS, as these are logic constraints, but instead uses primary INDEXES, which are a physical implementation. Although the Teradata create table syntax allows for the words PRIMARY KEY, this is actually interpreted (and implemented) as a unique, not null primary INDEX. Whenever the documentation makes references to a Primary Key it is therefore inferring a connection to the modeling world. Only when referring to a Primary Index, is it talking about the physical implementation and it's associated rules.

Hope this helps,

Jason

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