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Creating views with Read only option : In the view definition this option is used to make sure that no DML operations can be done on the view.
What are the two approaches to store relations in distributed database? a) Replication b) Fragmentation
What is system log? What are the entries? Ans: The system log that is generally written on stable storage contains the redundant data required to recover from volatile
What is meant by heuristic optimisation? Discuss the main heuristics that are applied during query optimisation. Ans: In heuristic optimization, heuristics are employed to r
What is the difference between serial and sequential files? How searching is applied on both? Ans: A serial file is one where the records have been stored in the order where
Explain the concept of generalization and aggregation in E_R diagrams. Give one example for each one of them? Generalization: Consider extending the entity set account throug
Explain the conventions (relationships) for displaying an ER schema as an ER diagram.
diagrams and meaning
Design a gennalization and specialization hierarchy for an automobile sales company
Describe integrity constraints? Integrity Constraints - A database is just as excellent as the information stored in it, and a DBMS must therefore help avoid the entry of inc
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