EER models, Database Management System

Assignment Help:
Ask question #MinimThe Georgia Tech Library (GTL) has approximately 16,000 members, 100,000 titles, and
250,000 volumes (an average of 2.5 copies per book). About 10 percent of the volumes are out on
loan at any one time. The librarians ensure that the books that members want to borrow are
available when the members want to borrow them. Also, the librarians must know how many copies
of each book are in the library or out on loan at any given time. A catalog of books is available online
that lists books by author, title, and subject area. For each title in the library, a book description is
kept in the catalog that ranges from one sentence to several pages. The reference librarians want to
be able to access this description when members request information about a book. Library staff
includes chief librarian, departmental associate librarians, reference librarians, check-out staff, and
library assistants.
Book can be checked out for 21 days. Members are allowed to have only five books out at a
time. Members usually return books within three to four weeks. Most members know that they have
one week of grace before a notice is sent to them, so they try to return books before the grace
period ends. About 5 percent of the members have to be sent reminders to return books. Most
overdue books are returned within a month of the due date. Approximately 5 percent of the
overdue books are either kept or never returned. The most active members of the library are
defined as those who borrow books at least ten times during the year. The top 1 percent of
membership does 15 percent of the borrowing, and the top 10 percent of the membership does 40
percent of the borrowing. About 20 percent of the members are totally inactive in that they are
members who never borrow.
To become a member of the library, applicants fill out a form including their SSN, campus
and home mailing addresses, and phone numbers. The librarians issue a numbered, machinereadable
card with the member’s photo on it. This card is good for four years. A month before a card
expires, a notice is sent to a member for renewal. Professors at the institute are considered
automatic members. When a new faculty member joins the institute, his or her information is pulled
from the employee records and a library card is mailed to his or her campus address. Professors are
allowed to check out books for three-month intervals and have a two-week grace period. Renewal
notices to professors are sent to their campus address.
The library does not lend some books, such as reference books, rare books, and maps. The
librarians must differentiate between books that can be lent and those that cannot be lent. In
addition, the librarians have a list of some books they are interested in acquiring but cannot obtain,
such as rare or out-of-print books and books that were lost or destroyed but have not been
replaced. The librarians must have a system that keeps track of books that cannot be lent as well as
books that they are interested in acquiring. Some books may have the same title; therefore, the title
cannot be used as a means of identification. Every book is identified by its International Standard
Book Number (ISBN), a unique international code assigned to all books. Two books with the same
title can have different ISBNs if they are in different languages or have different bindings (hardcover
or softcover). Editions of the same book have different ISBNs.
The proposed database system must be designed to keep track of the members, the books,
the catalog, and the borrowing activityum 100 words accepted#

Related Discussions:- EER models

What is a recovery scheme, What is a recovery scheme? An integral part ...

What is a recovery scheme? An integral part of a database system is a recovery scheme that can restore the database to the reliable state that existed before the failure.

What is natural language interfaces, What is Natural Language Interfaces? ...

What is Natural Language Interfaces? Natural Language Interfaces - These interfaces accept requests written within English or a few other language and attempt to "understand" t

Aggregation, What does Aggregation mean?

What does Aggregation mean?

Define multivalued dependency, Define multivalued dependency.  What do unde...

Define multivalued dependency.  What do understand by trivial multivalued dependency?  Ans: A multivalued dependency is a full constraint among two sets of attributes in a rela

Compare wait-die deadlock prevention with wait-wound scheme, Compare wait-d...

Compare wait-die deadlock prevention scheme with wait-wound scheme   Ans:  Wait-Die Scheme  a) Based upon a nonpreemptive technique.  b) If Pi requests a resource present

What is trigger, What is trigger?  Triggers are statements that are exe...

What is trigger?  Triggers are statements that are executed automatically by the system as the side effect of a modification to the database.

What is hierarchical dbms, What is Hierarchical DBMS In HDBMS, data is ...

What is Hierarchical DBMS In HDBMS, data is structured in a tree like manner. There is a parent-child relationship between data items and the data model is very suitable for re

Design of distributed databases, Design Of Distributed Databases: The dist...

Design Of Distributed Databases: The distributed databases are mainly relational at local level. So a local database schema is the similar as that of a centralised database design

List the reg-no of vehicles owned in relational algebra, Given the followin...

Given the following relations Vehicle (Reg_no, make, colour) Person(eno, name, address) Owner(eno, reg_no) Write expressions in the relational algebra to answer the following

Define the term- control as state within program, Control as State within P...

Control as State within Program 1.  The term control exactly means to check effect of input within a program. For illustration, in Figure, after the ATM card is inserted (a

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd