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Design full - adder using only NOR gates
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Expert answered|theacool|Points 25|
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Asked 9/22/2012 12:38:30 AM
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What is an unsafe query? Give an example and explain why it is important to disallow such queries.
Weegy: Consider the query { S | ¬(S e Sailors) }. This query is syntactically correct. However, it asks for all tuples S such that S is not in (the given instance of) Sailors. [ The set of such S tuples is obviously infinite, in the context of infinite domains such as the set of all integers. This simple example illustrates an unsafe query. It is desirable to restrict relational calculus to disallow unsafe queries. ] (More)
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Expert Answered
Asked 9/22/2012 12:26:16 AM
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What is the meaning of multimedia data?
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Updated 9/22/2012 2:47:06 AM
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These are typically the elements for the building blocks of ore generalized multimedia environments, platforms, or integrating tools.
Added 9/22/2012 2:47:07 AM
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