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Please do it ASAP 2. (4 points) Given two relation schemas P(A,B,C,D) and Q(C,E,F,G), there are two equivalent algebra expressions E1 and E2. Try to

Please do it ASAP
2. (4 points) Given two relation schemas P(A,B,C,D) and Q(C,E,F,G), there are two equivalent algebra expressions E1 and E2. Try to analysis and discuss which has better performance . E1=A(B=EG=99(PQ))E2=A(B=E(P(G=99(Q)))

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Please do it ASAP 2. (4 points) Given two relation schemas P(A,B,C,D) and Q(C,E,F,G), there are two equivalent algebra expressions E1 and E2. Try to

Please do it ASAP 2. (4 points) Given two relation schemas P(A,B,C,D) and Q(C,E,F,G), there are two equivalent algebra expressions E1 and E2. Try to analysis and discuss which has better performance . E1=A(B=EG=99(PQ))E2=A(B=E(P(G=99(Q)))

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Please do it ASAP
2. (4 points) Given two relation schemas P(A,B,C,D) and Q(C,E,F,G), there are two equivalent algebra expressions E1 and E2. Try to analysis and discuss which has better performance . E1=A(B=EG=99(PQ))E2=A(B=E(P(G=99(Q)))