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What is trigger? Triggers are statements that are executed automatically by the system as the side effect of a modification to the database.
design a generalization specialization hierarchy for a motor vehicle sales company. the company sells motorcycles, passenger cars, vens and buses.
explain the level architectures of the database management system
What is meant by heuristic optimisation?Discuss the major heuristics that are applied during query optimisation.
What is schema
What is a super key? A super key is a set of one or more attributes that collectively permits us to recognize uniquely an entity in the entity set.
File Organisation And Its Types Just as arrays, trees, lists and other data structures are used to execute data Organisation in main memory, a number of planning's are used to
Advantages of Observation Methods: Bailey has pointed out four advantages of observation: 1. Superior in Data Collection on Non Verbal Behavior: When a person a opi
Timestamp Ordering Protocol A timestamp is a tag that can be attached to any transaction or any data item, which indicates a specific time on which the transaction or data item
In E-R diagram how generalization is represented? in E-R diagram generalization is represented by Triangle shape.
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