Targate 10 ID 2260 Question number 42

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Targate 10 ID 2260 Question number 42

Postby zealdeal » Mon Jan 21, 2013 12:00 pm

F = { A -> BC, CD -> E, B -> D, E -> A } decomposed into D = {ABC, CDE}.

Shouldnt this be lossless?
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Re: Targate 10 ID 2260 Question number 42

Postby nikhil420 » Mon Jan 21, 2013 8:06 pm

YES..The ans Has to be Lossless but not Dependency Preserving....But their Ans is Seems Wrong To me..
Everything IS Happened For The Reason.....!!!
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Re: Targate 10 ID 2260 Question number 42

Postby amitmandal03 » Mon Jan 21, 2013 8:13 pm

no , this is lossy !
common attribute C does not identify any decomposed relation
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