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It defines that no primary key value can be null. This is as the primary key is used to recognize individual tuple in the relation. So we will not be able to recognize the records
difference between internal schema and external schema in DBMS
Question: In relation to distributed database answer the following questions: (i) Give a brief definition of distributed database. Support your answer with an appropriate di
Which is an advantage of view? The Advantages of view is Data security, Derived columns and Hiding of complex queries
Benefits of using heuristics
does tables are called relations
#quesDefine a job scheduling strategy that will meet business requirement of reporting availability by 6am CST for the following cubes? Show the job scheduling dependencies in a pi
State the data flow diagram of functional model Any action initiated by transition in the state diagram can be extended into an entire data flow diagram in functional model. Th
In E-R diagram how generalization is represented? in E-R diagram generalization is represented by Triangle shape.
what is correlation in nested query
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