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Oracle Interview - difference between primary key, unique key

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05-16-2008, 10:48 AM

bharath

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Oracle Interview - difference between primary key, unique key

what is the difference between primary key, unique key, sorrougate key?

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05-17-2008, 10:26 AM

ram101

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primaruy key should not dontain nulls and unique key can contains null values.

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