Database

Question

Consider a relation R={M, N, O,P, Q, R, S, T} with the following set of dependencies: MN Q M RQ N R R ST Next consider the following set of decompositions for the relation schema R: D1= {R1,R2,R3,R4}: R1={M,N,O,P}, R2={M,P,Q}, R3= {N,R}, R4={R,S,T} D2= {R1,R2,R3,R4}:

Does D1 decomposition is lossless as m,p,q is Not key to any?