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Explain about primary key Primary Key: It is one of the candidate keys that are taken to be the recognizing key for the entire table. E.g. although there are two candidate ke
Describe association design of an object by giving one suitable example of it. The Design of Associations Associations are "glue" of advanced object oriented analysis and
List the Armstrong's axioms for functional dependencies. What do you understand by soundness and completeness of these axioms? Ans: The Armstrong's axioms are: F1:
How many types of Views are there? There are Four types of views:- Database View Help View Projection View Maintenance View
what is binary relationship
Question: (a) Discuss the difference between a composite key and a composite attribute. How would each be indicated in an E-R diagram? Support your answer with appropriate exam
anyone have a textbook solutions case fair, 8 edition of vol 1 ?, please give me
Code an Oracle Database trigger to enforce the constraint that an employee can never change his or her department.
What is the error handling Traditionally, bits have been sent over line lacking any error correcting scheme in physical layer. The presence of the CPU in each modem makes it po
What is the meaning of Data Independence ?
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