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State true or false: Selection operations are commutative(a) True(b) FalseThe question was posed to me in exam.My query is from Transformation of Relational Expressions in section Query Processing and Optimization of RDBMS |
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Answer» RIGHT CHOICE is (a) True Easy explanation: Selection operations are commutative i.e. selection1(selection2(R)) = selection2(selection1(R)). |
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