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DRAW THE E-R DIAGRAM LISTING ENTITIES, ATTRIBUTES AND RELATIONSHIPS FOR THE FOLLOWING SCENARIO:
A county wishes to create a database to control its local libraries. Each library has a number of employees, one of whom is designated as the manager of the library and is responsible for supervising employees and the general day-to-day management of the library.
Each library stores a number of books and CDs. A citizen has to become a member of a library before he/she is allowed to borrow any books, but thereafter can borrow books from any county library. Generally, a library stocks a number of copies of each book title and each CD. Details of books publishers are maintained but not CD publisher.
Can you provide the answer as soon as possible and there is no word limit?
From the JD, the set of relation schemes SP, PJ, and JS is a lossless-join decomposition of SPJ. Construct an instance of SPJ to illustrate that no two of these schemes su?ce.
vehiclerentaloz data warehousevehiclerentaloz is a large chain of vehicle rental company over 500 stores distributed
q 1 name 3 common vulnerabilities in web applications. how does a company protect against these vulnerabilities?q 2
Explain the following terms brie?y: attribute, domain, entity, relation-ship, entity set, relationship set, one-to-many relationship, many-to-many relationship, participation constraint, overlap constraint, covering constraint, weak entity set, aggre..
you were tasked to create an oracle database for a company to track their employees and projects. after speaking with
If each instance for R listed above is legal, what can you say about the FD A → B?
metropolis toys metropolis toys is an independent family-owned manufacturer of wooden toys. the toys are designed by
Describe the normal forms violated in the following design and fix them to the third normal form.
Choice of search key for the index. What is a composite search key, and what considerations are made in choosing composite search keys? What are index-only plans, and what is the in?uence of potential index-only evaluation plans on the choice of sear..
you are to design a database for an insurance company. the data will include information about customers name address
Athabasca University has about 32,000 students between the ages of 17 to 60. Consider the AU student relation with the following schema.
Map the EER schema into a set of relations. For the VEHICLE to CAR/ TRUCK/ SUV generalization, consider the four options presented
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