can any1 help me with this
Given a relation R = (P, Q, R, X, Y, Z), and the
FDs: {PQ ->XY, RX-> Y, Q-> YZ, XZ-> PR, QX-> PZ}
If R is decomposed into two relations R1(P,Q,X,Z) and R2(R, X, Y,Z)
Is this decomposition dependency preserving or not?