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What are the three data anomalies that are likely to occur as a result of data redundancy? Can data redundancy be completely eliminated in database approach? Why or why not? A
Define the Canonical cover Ans: A canonical cover F c for F is a set of dependencies like F logically implies all dependencies in F c , and F c logically entails all dependen
Describe relational model? Structure of relational data base Basic structure Database schema Keys Schema diagram Query languages
What is known as clustering file organization? In the clustering file organization, records of several dissimilar relations are stored in the similar file.
Question: a) Discuss the concept of data independence, explaining its importance in a database environment. b) To address the issue of data independence, the ANSI-SPARC t
10A.53 Code an Oracle Database trigger to enforce the constraint that an employee can never change his or her department. 10A.54 Code an Oracle Database trigger to allow the
Determine Which is not a consequence of concurrent operations? Ans: Update anomaly.
Explain the function of Object model Object model describes the classes of objects in system, including their attributes and operations which they support. The analysis object
Attributes that are directly kept in the data base. For example, 'Birth date' attribute of a person. Derived Attributes that are not stored directly but can be derived
What is advantage of two-way association? Two-way association advantages are following: a) Independent of the classes. b) Useful for existing predefined classes that are
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