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Given two relation schemas P(A,B,C,D) and Q(C,E,F,G), there are two equivalent algebra expressions El and E2. Try to analysis and discuss which has better
Given two relation schemas P(A,B,C,D) and Q(C,E,F,G), there are two equivalent algebra expressions El and E2. Try to analysis and discuss which has better performance. E = A(OB=EAG=99 (PQ)) E = A (OB=E(P (OG=99(Q)))
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Management Accounting
Authors: Leslie G. Eldenburg, Albie Brooks, Judy Oliver, Gillian Vesty, Rodney Dormer, Vijaya Murthy, Nick Pawsey
4th Edition
0730369382, 978-0730369387
