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Define an operator that a Relational Algebra does not have Ans: Relational Algebra does not have Aggregation operators.
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Consider the following relational scheme: R (a,b,c,d,e,f) and its corresponding set of FDs {d→ a, be → c, ac → e, b → f, f → d, a → c}. a. Is the following decomposition i) non
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Database systems have many opposite efforts ?
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