Schedule 1

T1: R(X)      W(X)
T2:      R(X)      W(X)

T1T2 ... T1:R(X)W(X) T2:R(X)W(X)
T2T1 ... T2:R(X)W(X) T1:R(X)W(X)
not view-serializable


Schedule 2

T1: W(X)      R(Y)
T2:      R(Y)      R(X)

T1T2 ... view equiv ... T2 reads X(T1), T1 write Xn
view-serializable


Schedule 3

T1: R(X)      W(X)
T2:      W(X)
T3:                W(X)

T1T3T2 ... not view equiv ... T1 reads X0, T2 writes Xn !!
T1T2T3 ... view-equiv ... T1 reads X0, T3 writes Xn
view-serializable