Dependency Preservation ensures that no functional dependencies are lost during the decomposition process.TRUEFALSENext

Dependency Preservation ensures that no functional dependencies are lost during the decomposition process.

Which of the following statements about dependency preservation is true?Dependency preservation ensures that all relations are in 2nd Normal Form (2NF).It guarantees that no transitive dependencies exist in a relation.Dependency preservation is only relevant for relations with composite keys.It ensures that the decomposition of relations during normalization maintains the same functional dependencies.

Dismantling and pre-processing is done to liberate the valuable components from each other prior to the final recovery processes, as well as to safely remove and store or treat hazardous substances. TrueFalse

Properties of RelationalDecompositions (3) Dependency Preservation Property of aDecomposition: Definition: Given a set of dependencies F on R,the projection of F on Ri, denoted by Ri(F) whereRi is a subset of R, is the set of dependenciesX  Y in F+ such that the attributes in X υ Y are allcontained in Ri. Hence, the projection of F on each relationschema Ri in the decomposition D is the set offunctional dependencies in F+, the closure of F,such that all their left- and right-hand-sideattributes are in Ri.

What disadvantage is associated with lossless join and dependency preserving decomposition?