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Describe identifying relationship?
Identifying relationship: It is relationship among strong entity and a weak entity it is represented through a doubly outlined diamond in Chen notation.
What is the use of keyword ISA? The use of keyword ISA is to show that a class is a specialization of another class.
Discuss The difference between drop table R and delete from R. DROP TABLE command deletes all the records with the table definition. This command will automatically committed
An orchestra database consists of the following relations: CONDUCTS (conductor, composition) REQUIRES (composition, Instrument) PLAYS (Player, Instrument) Give the relational
What is abstraction? Abstraction in the object orientation is a idea that provide opportunity to express necessary properties of object without providing much details of the im
Explain the rules for creating a labelled precedence graph for testing view serializability. Ans: A schedule S is view serializable if it is view equivalent to a ser
Process of implementing system design in dynamic models There are three essential approaches to implementing system design in dynamic models. These approaches are as below:
How external/conceptual mapping and conceptual /internal mapping is performed
The technique of converting the state diagram to code a) Identify all major control paths. Start from initial state; choose a path across the diagram that corresponds to normal
Can a domain, assigned to a data element be changed? Yes. We can do so by just overwriting the entry in the field domain.
A step-wise distributed database design methodology Following is a step-wise methodology for distributed database design. (1) Examine the nature of distribution. Find out wh
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