Equivalence - E1 and E2 representations

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> Equivalence - E1 and E2 representations

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04-22-04, 17:19

dianemckeaveney dianemckeaveney is offline

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Equivalence - E1 and E2 representations

Hello

Can any one help with the following question - "Present an example to show that an E1 representation need not be an E2 representation"

I know an E1 representation is dependency preserving - and E2 is data preserving in the form of a lossy join

But this is all i know....... has anyone any ideas of an example or could explain this to me ?

Thanks

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