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Condition for a good schema design

Why are normal forms alone insufficient as a condition for a good schema design? Sample Solution

What is meant by the completeness and soundness of Armstrong’s inference rules? Sample Solution

Why should NULLs in a relation be avoided as much as possible? Discuss the problem of spurious tuples and how we may prevent it. Sample Solution

What is the difference between data-centric and document-centric XML documents? Sample Solution

What is meant by the type orthogonality of OQL?What are the differences between the use of tags in XML versus HTML? Sample Solution

What is the difference between persistent and transient objects? How is persistence handled in typical OO database systems? Sample Solution