Decomposition is dependency preserving b. Decomposition is lossless c. Decomposition is not satisfying dependency preserving property. d. Decompositio code example

Example: lossless join decomposition

In database design, a lossless join decomposition is a decomposition 
of a relation R into relations R1 ,R2 such that a natural join of the 
two smaller relations yields back the original relation. 
This is central in removing redundancy safely from databases while 
preserving the original data.