What is Lossless Decomposition in the context of Database Management Systems (DBMS)?Decomposing a relation to eliminate redundancy without preserving original data.Decomposing a relation in a way that the natural join of resulting relations yields the original relation.Decomposing a relation to increase redundancy while preserving original data.Decomposing a relation without considering common attributes
Question
What is Lossless Decomposition in the context of Database Management Systems (DBMS)?Decomposing a relation to eliminate redundancy without preserving original data.Decomposing a relation in a way that the natural join of resulting relations yields the original relation.Decomposing a relation to increase redundancy while preserving original data.Decomposing a relation without considering common attributes
Solution
Lossless Decomposition in the context of Database Management Systems (DBMS) refers to the process of decomposing a relation in such a way that the natural join of the resulting relations yields the original relation. This means that no information is lost during the decomposition process, hence the term "lossless". This is important in DBMS to ensure data integrity and to avoid redundancy.
The other options you provided are not correct.
- Decomposing a relation to eliminate redundancy without preserving original data could result in loss of information, which is not desirable.
- Decomposing a relation to increase redundancy while preserving original data is also not desirable as it could lead to inconsistencies and anomalies.
- Decomposing a relation without considering common attributes could also result in loss of information and inconsistencies.
Therefore, the correct answer is: Decomposing a relation in a way that the natural join of resulting relations yields the original relation.
Similar Questions
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Properties of RelationalDecompositions (2) Relation Decomposition andInsufficiency of Normal Forms (cont.): Decomposition: The process of decomposing the universal relationschema R into a set of relation schemas D ={R1,R2, …, Rm} that will become the relationaldatabase schema by using the functionaldependencies. Attribute preservation condition: Each attribute in R will appear in at least onerelation schema Ri in the decomposition so that noattributes are “lost”.
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