Hong Kong Advanced Level Examination

2009

ASL Computer Applications Paper 2

Web-based library

system

Xxxxxxxxxx College

xxxxxxxxxx

7A(xx)

P.1

Content Problem definition…………………………………………………………………...3

Background……………………………………………………………………..3

Assumption……………………………………………………………………..3

Feasibility studies…………………………………………………………………….4

Present environment…………………………………………………………….4

Problems on present environment………………………………………………5

Web-based library system………………………………………………………6

Advantages of web-based library system………………………………………6

Design phase…………………………………………………………………………7

Capturing information………………………………………………………….7

For capturing information of books…………………………………………….7

For capturing information of users……………………………………………..7

Hardware requirement………………………………………………………….9

Software requirement………………………………………………………….10

Model of the network………………………………………………………….12

Backup policy…………………………………………………………………13

Other fault-tolerant features…………………………………………………...13

Documentation………………………………………………………………...13

Functional diagram……………………………………………………………15

Database schema………………………………………………………………16

E-R diagram…………………………………………………………………...16

Data definition language………………………………………………………18

Description of fields…………………………………………………………...20

Input dialog and report screen…………………………………………………23

Other function of the web-based library system………………………………32

Security………………………………………………………………………..33

Testing the network……………………………………………………………33

Conclusion………………………………………………………………………….34

Reference…………………………………………………………………………...34

Appendix……………………………………………………………………………35

P.2

Problem definition In this project, we need to construct a web-based library system to make the use of

the school library be more conveniently to the users.

It is a library system which can use the school library through a website. Through

this web-based library system, the library users can check their borrowing record,

search the book they want to borrow, make a book reservation, renewal of the library

material they borrowed. The school library can also through this web-based library

system to remind the users to return the library materials and tell them to pay the

penalty for late returning the materials they borrow.

Background:

Xxxxxxx College is going to develop a web-based library system. The school

principal thinks that the use volume of the school library is too small, she thinks that

it is due to the inconvenience of the current library system. Therefore, she decides to

develop a web-based library system to encourage students to use the school library.

Assumption:

(a) Only books and discs are in the school library.

(b) There is no workstation in the school library for the students and teachers to use.

(c) Each book has only one copy in the school library.

(d) It can borrow the book for 14 days, including Saturday and Sunday.

(e) Discs cannot be borrowed out. It can just use it in the library.

(f) No need to borrow disc in the library, when user want to use the disc, just need

to ask the librarian to get the disc

(g) There is no server for the school library.

(h) All the information, including information of books and students, are needed to

capture.

(i) Student needs a library card to borrow books.

(j) Other people outside the school cannot use the school library.

(k) Late for returning the book, $0.5 per day is charged.

P.3

Feasibility study Present environment The school library system is not web-based now. It just contains a internal library

system. The functions in this system is limited

Book searching

The library users need to search the book from the shelf one by one to find the book

they want to read.

Book reservation

There is no book reservation in the library. If library users want to borrow the book,

they should wait for other user to return the book at the same time no other users

want to borrow this book.

Renewal of library materials

Library users should bring the library materials to the counter in the library to

proceed the renewal process.

Borrowing book

Library users should bring the book from the book shelf and go to the counter to

proceed the borrowing process.

Returning book

Library users should bring the book to the counter to proceed the returning process.

Book classification

The books in the school library are classified by Dewey Decimal Classification.

The information of the book is stored in a database and the database is stored in the

file server in the server room of the school.

Late for returning book

If students is late for returning book, library will give a handwrite reply slip to that

student through his/her class teacher to remind he/she to return the book and pay the

penalty.

P.4

Problems on present environment

There are many problem present in this library system, they are:

(1) Hard to search the book

In recent library system, there is no program or method that can help users to

search the book they want. Users need to search the book they want to borrow

shelf by shelf, it is very inconvenient and time consuming.

(2) No advance booking

Users cannot reserve the book they want to borrow in this recent system. If the

book is borrowed by another user, other user need to wait until that user to return

the book, and then go to the library to borrow this book

(3) Do not know when the book is available

Users do not know the book they want to borrow is available or not in this

library system. Users need to go to the library to search the book from the book

shelf to find out the book is available or not. It is inconvenient to users and

causes the low utility rate of the library.

(4) Easily to lost the reply slip

In the recent library system, if student is late for returning the book, the library

will give a hand-wrote reply slip to that student through his/her class teacher to

remind he/she to return the book and pay the penalties for being late returning. It

is easily for student get lose of the reply slip.

(5) Inconvenient

No matter doing what process, users need to do it through the counter in the

library. It is very inconvenient for users because the opening hour of the library

is limited, it fixed the time for user to use the library.

(6) Do not know the book is good or not

There is no way for user to know the book is good or not. The users need to find

out by themselves through reading the book.

It causes library users inconvenient to use the library. Due to these problems, we

need to construct a web-based library system to improve it.

P.5

Web-based library system

In the web-based library system, it will provide several functions that the present

library system does not provide, they are:

(1) Book searching

(2) Book reservation

(3) Renewal of library material through the website

(4) Email notification

(5) Borrow record

(6) View the comment of books

(7) Write a comment for the book

Advantages of web-based library system

(1) Searching the book easily

By entering the information, users can search the book in the library website,

they can know whether the book is existed in the library or not, they can also

know the book can be borrow or already borrowed by other users.

(2) Can make a reserve of the book

Users can make a reserve of the book they want to borrow.

(3) No need to go to the library to renew the book they borrow

Users can renew their borrowed book in their home.

(4) Through the comment written by other users, can know the book is good or

not

Through the comment written by the other users, we can know more details of

the book. It can help the user to decide borrow the book or not

By these functions provided in the web-based library system, users can use the

library more conveniently. It can encourage students to use the school library more.

P.6

Design phase

Capturing information

To develop a web-based library system, all the data should be captured again,

including the information of the book and the information of the user. The capturing

method will be discussed in the following part.

For capturing information of books Because we assume that there is no server for the school library in present

environment and all the information are store in the file server of the school, we

need to enter all the information into a new database server of the school library.

Therefore we need to capture the information of the book by man power. School

librarians needs to help to collect the information of the book, including

(1) the call number(equal to the book id)

(2) the name of the book

(3) the author of the book

(4) the publisher of the book

(5) the cost of the book

(6) the language of the book wrote

(7) the category of the book

After finishing collection of the above information, the school IT staff will help to

enter these information into the new database.

For capturing information of users We need to capture the information of students and teachers to make a new library

card for them to use the library. They need to fill a application form.

The application form for collecting the information of students and teachers

P.7

After filling the application, the school library will make a new library card for them

to use the school library.

New library card

Front:

Basic information

of the user XXXXX College

Photo of the

user

School

Logo

Back:

School

Logo Barcode of

the user id

In the front side of the library card, it record some basic information of the user,

including their name their user id, their position and their photo. The photo in the

front side is used to identify the user by the school librarians when the user using the

school library. In the back side of the library card, it has a barcode of the user id, it

can be read by the barcode reader and link to the table ‘user’ and other related table

in the database. The user id in the front side is used when the barcode in the back

side cannot read by the barcode reader.

P.8

Hardware requirement To develop a web-based library system, several new hardware are need to buy, they

are:

Hardware Quantity

Web server 1

Database server 1

Workstation 4

Barcode reader 2

hub 1

Crossover cable 2

Straight-through cable 4

The web server is used to hold the web site of the school library. Because the

website should available anytime, therefore the web server should be reliable

enough

The database server is used to store all the tables which need to use in the library

system. The database server will contain two hard disk to perform RAID 1 for

mirroring the data.

Between the web server and database server, they are connect by a crossover cable.

Four workstations is needed in the new library system. Two of them are connected

with a barcode reader, they are used by the school librarian to do the work like

borrowing and returning of the book. The barcode reader is used to capture the book

id and user id on the book and library card. Another two workstations are set up in

the library and provide for students to use.

A hub is used to connect all the workstations in the library to a switch already

represent in the third floor, which is the location of the school library. Between

workstations and the hub, they are connected by four straight-through cables.

Between the hub and the switch, they are connected by a crossover cable.

P.9

Software requirement Software Quantity

Operating system 4

Network operating system 1

Database software 1

Operating system

The workstations in the library should install an operating system. There are two

operating systems for us to choose, they are Microsoft Windows and Linux:

Operating system

Microsoft Windows

Linux

Price Expensive Free

Interface Graphical user interface Text-based command line interface

License Yes. It cannot be modified if no permission

No. It can be modified anytime.

I will choose Microsoft Windows as an operating system install in workstation in the

school library. Although Linux is free, the interface of Linux is usually text-based

command line interface, it needs to type the commands to control the operating

system, it usually uses by the user who has better programming technique. Moreover,

students usually use Microsoft Windows in their home, they are familiar with

Microsoft Windows rather than Linux. So although Microsoft Windows is expensive,

I still choose Microsoft Windows as an operating system.

Network Operating System

For the network operating system install in the database server and the web server, I

will also choose the Microsoft Windows rather than Linux. It is because when we

choose Microsoft Windows, the school will not need to provide addition training for

the IT staffs to learn how to use the network version of Linux.

P.10

Database software

We need to install a database software in the database server. There are several

database software in the market for us to choose, we will compare two of them,

which are MySQL and Microsoft Access

Database software

MySQL

Microsoft Access

Cost Free Expansive

Cross platform Yes No

License Open sources software Not open software

MySQL

MySQL is a relational database management system (RDBMS) which has more than

11 million installations. The program runs as a server providing multi-user access to

a number of databases.

MySQL is owned and sponsored by a single for-profit firm, the Swedish company

MySQL AB, now a subsidiary of Sun Microsystems, which holds the copyright to

most of the codebase. The project's source code is available under terms of the GNU

General Public License, as well as under a variety of proprietary agreements.

Microsoft Access

Microsoft Office Access, previously known as Microsoft Access, is a relational

database management system from Microsoft that combines the relational Microsoft

Jet Database Engine with a graphical user interface and software development tools.

It is a member of the Microsoft Office suite of applications. However it is not

included with the Microsoft Office suite for Macintosh, leaving Mac users looking

for a database application to use Open Office instead.

Access stores data in its own format based on the Access Jet Database Engine. It can

also import or link directly to data stored in other Access databases, Excel,

SharePoint lists, text, XML, Outlook, HTML, dBase, Paradox, Lotus 1-2-3, or any

ODBC-compliant data container including Microsoft SQL Server, Oracle, MySQL

and PostgreSQL. Software developers and data architects can use it to develop

application software and non-programmer "power users" can use it to build simple

P.11

applications. It supports some object-oriented techniques but falls short of being a

fully object-oriented development tool

For the database software uses in the database server, I will choose MySQL rather

than Microsoft Access. It is because MySQL is free of charge and it has cross

platform capability, it can be use in Microsoft Windows and Linux. However,

Microsoft Access can only use in Microsoft Windows.

Model of the network

About the network design

It is a client-server network. The network model contains a database server, a web

server, a router, a firewall, a switch, a hub, and 4 workstations.

All the workstations in the library will connect to a hub in the library by a

straight-through 10base-T UTP cable because the length between workstations and

the hub is not long. Then the hub will connect to a switch on the same floor by a

crossover 10base-T UTP cable.

Switch on the third floor(the location of the school library) is connect to a switch on

the server room by an optical fiber. Optical fiber is used because it is the backbone

of the network in the school, it need to transfer all the traffics on the third floor to

the server room.

The switch in the server room will connect to the library’s web server and the web

server is connected to the database server. Therefore, workstations in the library can

P.12

access the library website without going out to the Internet.

The switch in the server room will connect to a firewall and then connect to a router.

It allows the outside to access the library website by using the Internet

Backup policy The information in the database server will backup at 11p.m. every night. Moreover,

the database is very important in the network, the database system will use RAID 1

which provides mirroring of the data. If one of the hard disk in the database server is

down, it can still use another hard disk to prevent the failure of the library system.

Other fault-tolerant features UPS (uninterruptible power supply) in the server room, it can prevent the suddenly

shut down of the server which is cause by the power failure.

The firewall connected with the router can prevent the attack on the web server from

the Internet

Documentation After a network is set up, it is necessary to record what has been done in order to

provide information for the future maintenance or upgrade. The information should

be documented include:

Document Description

Address List

Internal IP address of connecting devices, servers.

MAC address of certain computers.

Global IP address of the site

Cable Map

Location of each wall-jack For each wall-jack, the corresponding

ports in the hub/switch

Contact List Phone number of network

administrator, vendor etc.

Equipment List

Date of purchase Serial number

Vendor information

Network History

What problems have occurred, including date and time

The symptoms of problems

Solution of problems

Network Map Hardware location Cabling

Policies and procedures Policies for users

P.13

Procedures for performing backups

and restore.

Server Configuration

Server hardware configuration Type of data stored

Schedule and location of backups

Software configuration Software installed on each node and

its configuration date Exceptions to standard configurations

Software Licensing

The number of user licenses The license number for each software

on the network

User administration List of UserID Corresponding password of the user

P.14

Functional Diagram

Searching Reservation Renew View borrow

record

Email

notification

Login the

library

website

Search for

required

data from

database

Output

borrow

record

through the

website

Input

informati

on

Search

the

matched

data from

database

Output

suitable

record

through

the

website

Login the

library

website

Search the

book

Update

data in

database

View the

borrow

record

Click the

renew

button

Update

data in

database

Check the

borrow

record in the

database

Check user

is late for

return or not

Send a

email to

remind user

Click the

reserve

button

Login the

library

website

Login the

library

website

Web-based

library system

P.15

Database schema User (user_id, f_name, l_name, sex, position, class, class_no, email, pw)

Reservation (reserve_id, user_id, book_id, expire_date)

Borrow_record (borrow_id, user_id, book_id, borrow_date, return_date, return,

renew)

Book (book_id, bookname, author, publisher, cost, state, language_id, category_id)

Language (language_id, name)

Category (category_id, name)

comment (comment_id, content, user_id, book_id)

Disc(disc_id, name, cost, type)

E-R diagram There are 8 entities in total, which develop 8 entity relationships. They are listed as

follow:

(1) Each user may have one or many reservation.

Each reservation must belong to only one user.

(2) Each user may have one or many borrow record.

Each borrow record must belong to only one user.

(3) Each user may have one or many comment.

Each comment must be written by only one user.

(4) Each reservation must belong to only one book.

Each book may have one or many reservation.

(5) Each borrow record must belong to only one book.

Each book may have one or many borrow record.

(6) Each comment must belong to only one book.

Each book may have one or many comment.

(7) Each book must belong to only one language.

Each language must contain one or many book.

(8) Each book must belong to only one category.

Each category must contain one or many book.

P.16

ER diagram:

P.17

Data definition language: CREATE DATABASE xxx_library;

USE xxx_library;

CREATE TABLE user

(

user_id integer(8) not null primary key,

f_name char(20) not null,

l_name char(10) not null,

sex char(1) not null,

class char(2),

class_no integer(2),

email char(50) not null,

pw char(20) not null

);

CREATE TABLE reservation

(

reserve_id integer(7) not null primary key

auto_increment,

user_id, integer(8) not null,

book_id integer(10) not null,

expire_date date not null

);

CREATE TABLE borrow_record

(

borrow_id integer(7) nor null primary key

auto_increment,

user_id integer(8) not null,

book_id integer(10) not null,

borrow_date date not null,

return_date date not null,

return char(1),

renew char(1)

);

P.18

CREATE TABLE book

(

book_id integer(10) not null primary key,

bookname char(50) not null,

author char(30) not null,

publisher char(30) not null,

cost decimal(5,1) not null,

state char(11),

language_id integer(3) not null,

category_id integer(3) not null

);

CREATE TABLE language

(

language_id integer(3) not null primary key,

name char(20) not null

);

CREATE TABLE category

(

category_id integer(3) not null primary key,

name char(20) not null

);

CREATE TABLE comment

(

comment_id integer(7) not null primary key

auto_increment,

content text not null,

user_id integer(8) not null,

book_id integer(10) not null,

);

CREATE TABLE disc

(

disc_id integer(5) not null primary key,

name char(30) not null,

cost decimal(5,1) not null,

type char(5) not null

);

P.19

Description of fields User

Field Example Description

user_id 10143058 Primary key. Uniquely identify each

user. First character may be ‘1’ or

‘2’, ‘1’ stands for student and ‘2’

stands for teacher.

f_name ‘Tai Man’ First name of the user.

l_name ‘Chan’ Last name of the user.

sex ‘m’ Sex of the user, ‘m’ stands for male

and ‘f’ stands for female.

class ‘2c’ This field can be empty if the user is

teacher. If the user is student, this

field indicates which class does the

student study in.

class_no 01 This field can be empty if the user is

teacher. This field shows the class

number of the student

email ‘taiman@hotmail.com’ Email address of the user. Use for

contact.

pw ‘abc123’ Password for the student to log in the

library website.

Reservation

Field Example Description

reserve_id 0000457 Primary key. Uniquely

identify each record of the

reserve.

user_id 10143058 Foreign key. Use to

connect the table ‘user’.

book_id 1000564752 Foreign key. Use to

connect the table ‘book’.

expire_date ’11-5-2008’ Deadline of the reserve for

the user.

P.20

Borrow_record

Field Example Description

borrow_id 0001245 Primary key. Uniquely

identify each borrow

record.

user_id 10143058 Foreign key. Use to

connect the table ‘user’.

book_id 1000564752 Foreign key. Use to

connect the table ‘book’.

borrow_date ‘3-4-2008’ Borrowing date of the

book.

return_date ’21-3-2008’ The date needs to return

the book.

Return ‘Y’ This field can be ‘Y’ or

null. ‘Y’ represents the

book has been returned.

Null represents have not

returned.

Renew ‘Y’ This field ban be ‘Y’ or

null. ‘Y’ represent the

book has renewed. Null

represent the book have

not renewed.

Category*

Field Example Description

category_id 100 Primary key. Unique id

for each category.

Name ‘Philosophy and

psychology’

Name of the category

*detail discuss in appendix part

Language

Field Example Description

language_id 001 Primary key. Unique id

for each language.

name ‘English’ Name of the language.

P.21

Comment

Field Example Description

comment_id 0000264 Primary key. Uniquely identify

each comment record.

content ‘this book is interesting’ Comment on the book.

user_id 10143058 Foreign key. Use to connect the

table ‘user’.

book_id 1000564752 Foreign key. Use to connect the

table ‘book’.

Book

Field Example Description

book_id 1000564752 Primary key. Uniquely identify each

book. This book id also same as the

call number of the book.

Bookname ‘Three Little Pig’ The name of the book

author ‘Peter Lee’ Name of the author.

publisher ‘ABC publishing Co.’ The name of the publisher.

cost 120.5 The price of the book.

state ‘Available’ This field can be ‘available’ and

‘unavailble’. ‘available’ means that

the book can borrow and reserve.

‘unavailable’ means that the book is

borrowed or reserved by other

people.

language_id 100 Foreign key. Use to connect the

table ‘language’

category_id 001 Foreign key. Use to connect the

table ‘category’

Disc

Field Example Description

disc_id 01234 Primary key. Uniquely

identify each disc.

name ‘love actually’ The name of the disc.

cost 150.2 The price of the disc.

type ‘CD’ Type of the disc. It can be

‘movie’ or ‘CD’.

P.22

Input dialog and report screen The school library website is written by html. Workstations do not need to install

any special software to visit the school library website.

login page of the website

XXXXXXX College

When users type the address into the browser, it will first show the login page. User

need to type their user id and their password to login. The user id is written on the

library card and the password is decided by the user when they write the form to get

the library card.

After type all the information and click the login button, the system will compare the

user data in the database.

For example, if the user id is 10224687 and his password is abc1234

SQL statement: select pw from user where user_id=10224687;

If the input data does not match the data saved in the database, the system will warn

the user and ask him to insert the information again.

P.23

The page when input data does not match with data saved in database

XXXXXXX College

If the input data is matched with the data saved at the database, it will go to the main

page of the web site.

main page of the school library website

School

Logo

XXXXXXX College

In the main page of the website, it will show some new information of the school

library. User can also do several things in the website, like viewing their borrow

record, renew the book they borrowed, search the book, reserve the book, write a

comment for the book and view the comment of the book.

P.24

Search page of the website

School

Logo

XXXXXXX College

In the search page, users can choose to search books or discs store in the school

library.

Page of searching the book

School

Logo

XXXXXXX College

In this page, users can search the book they want to borrow by providing some

information of the book, like the book name, author, publisher, language and the

category of the book.

P.25

For example, the user want to search a book which the book name contain the word

‘are’:

SQL statement: select bookname as name, author, publisher,

c.name as category, l.name as language from book as b,

language as l, category as c, b.state, where

b.language_id=l.language_id and

b.category_id=c.category_id and bookname like ‘%are%’;

The system will search the data in the database and search for the matched data, the

result will be provided after finishing searching.

The page of the searching result of the book

School

Logo

XXXXXXX College

If the user wants to reserve a book, he can click the button ‘reserve’ to reserve this

book. The system will be add a new record into the table ‘reservation’.

Page of successful reserve the book

School

Logo

XXXXXXX College

P.26

Page of searching the disc

School

Logo

XXXXXXX College

It the user clicks ‘disc’ in the search page, it will go to a page to search the disc store

in the library. After inserting the information of the disc, the system will search in

the database to find the match data.

For example, the user wants find a disc will contain the word ‘love’:

SQL statement: select name from disc where name like ‘%love%’;

After searching from the database, result will be display in a new page

Page of the result of searching the disc

School

Logo

XXXXXXX College

Because the disc can only use in the school library, therefore student cannot make a

P.27

reserve for the disc. The disc is therefore ‘first come, first serve’.

Page of viewing the record of the user

School

Logo

XXXXXXX College

When the user click the view record on the left hand side, his borrowing record will

be display in a new page.

For example, the user Chan Tai Wan has login the website and his id is 10224687:

SQL statement: selec b.bookname as Name, borrow_date as ‘Borrow

date’, return_date as ‘Return date’ from borrow_record as

b, book as bk where bk.book_id=b.book_id and

user_id=10224687;

If the user want to renew the borrowed book, the user can click the renew button.

The system will then update the record in the table ‘borrow_record’.

For example, the user wants to renew the book ‘Hello’ and the book id is

2001456789:

SQL statement: update borrow_record set return_date=date()+14,

renew=’Y’ where book_id=2001456789 and user_id=10224687 and

borrow_date=’1-2-2008’;

After renewing the book, a new page will be displayed to remind the user the book

has been renewed.

P.28

Page after renewing the book

School

Logo

XXXXXXX College

If the user click comment on the left hand side, a new page will be display, he can

choose to view comment or write comment.

Page of comment

School

Logo

XXXXXXX College

P.29

If the user click ‘View comment’, a page will display all comments of all books:

SQL statement: select concat(f_name, ‘ ‘, l_name) as user,

c.book_id as ‘Book ID’, bookname as ‘Book Name’, content from

comment as c, user as u, book as b where c.user_id=u.user_id

and c.book_id=b.book_id;

After searching from the database, all the comment will be display on the right hand

side.

Page of result of ‘View comment’

School

Logo

XXXXXXX College

If the user click the ‘Write comment’ on the comment page, a page will be display

for user to enter the comment. The user need to write their name, the book name, the

book id(same as the call number) and the comment on the book.

P.30

Page of ‘Write comment’

School

Logo

XXXXXXX College

For example, the user Chan Tai Wan(user id is 10224687) want to write a comment

‘This book is interesting’ on the book ‘They are Friends’(book id is 5001234567):

SQL statement: insert into comment (content, user_id, book_id)

value (‘This book is interesting’, 10224687, 5001234567);

After the user click the submit button, the record will be inserted into the table

‘comment’. A new page will be display to the user and tell them it has already

submit the comment.

Page after submit successful of the comment

School

Logo

XXXXXXX College

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When the user clicks ‘logout’ on the left hand side, it will logout the website of the

library. A page will be displayed and tell the user it successfully logouts.

Page of successful logout

XXXXXXX College

Other function of the web-based library system

The library system will check the borrow record at 12a.m. every day. If the user is

late for returning the book, the library system will send an email to the user email

account to remind him he is late for returning the book and need to pay penalties for

returning the book late.

The library system will find out the email address of the user which is late for

returning the book by following SQL statement:

Select email from user as u, borrow_record as b where

u.user_id=b.user_id and curdate()-return_date>0;

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System security Here are some methods to make the system more secure.

(1) Users should not expose their user id and password to other people.

(2) If a IP address has try to login the library website for more than 5 times in a hour,

the system will block this IP address.

(3) Provide a document for users that describe the security of the network about

what they should do and what they should not do

(4) Review the security logs of the NOS regularly

(5) Install a powerful anti-virus software and firewall in the web server and database

server

(6) Update the anti-virus software regularly

(7) Use setting on the firewall to disallow internet control message protocol(ICMP)

traffic service into the network to prevent denied of service.

Testing the network

1. Web Design

We should check if there is any wrong linking of web pages and picture, and the

position of the data’s table and the picture should be in the right order.

If there exists wrong linkages, we need to replace the right link using web software

like dreamweaver or frontpage.

2. SQL Development

We need to find out if the SQL statement shows expected result. If error messages

are received, the SQL statement needs to be broken down into basic form.

3. Hardware & Software

The hardware should be connected properly and software should be installed

properly.

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Conclusion

Here are some suggestions for further improvement

(1) E-Book for viewing book online

If E-Book is provide on the library website, users can read the book on the

website and no need to go to the library to borrow the book. E-Book can buy

from the publisher if the book has a digital format. However, not many

publishers provide a E-Book and the price of a E-Book is usually higher than a

hard copy one, therefore this function is not provide in this web-based library

system. This function can be provided in the future if E-Book is more popular.

(2) Self serving check out

With the self serving check out function, users can do the borrowing process by

themselves without going to the counter in the library. It makes the use of the

library more convenient. However, to provide this function, more hardware and

software are required. Due to the budget is limited, this function is not provide in

this web-based library system. If the school has more money, it can buy the

required hardware and software to provide this function.

Reference http://en.wikipedia.org/wiki/Mysql

http://en.wikipedia.org/wiki/Microsoft_access

http://www.bestwebsitedevelopment.com/webdesign-content/articles/MySQL-Versu

s-Microsoft-Access-37.html

http://www.skyportal.net/article_read.asp?title=MySQL+vs+MSSQL&item=26

http://hk.yahoo.com/

http://www.google.com

http://en.wikipedia.org/wiki/Dewey_Decimal_Classification

http://www.hkpl.gov.hk

Data Communications & Networking

Database for A/AS Level

Computer Concept

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Appendix

Dewey Decimal Classification

The Dewey Decimal Classification (DDC, also called the Dewey Decimal System)

is a proprietary system of library classification developed by Melvil Dewey in 1876,

and has been greatly modified and expanded through 22 major revisions, the most

recent in 2004. This system organizes books on library shelves in a specific and

repeatable order that makes it easy to find any book and return to its proper place.

How it works The DDC attempts to organize all knowledge into ten main classes. The ten main

classes are each further subdivided into ten divisions, and each division into ten

sections, giving ten main classes, 100 divisions and 1000 sections. DDC's advantage

in using decimals for its categories allows it to be both purely numerical and

infinitely hierarchical. It also uses some aspects of a faceted classification scheme,

combining elements from different parts of the structure to construct a number

representing the subject content (often combining two subject elements with linking

numbers and geographical and temporal elements) and form of an item rather than

drawing upon a list containing each class and its meaning.

Except for general works and fiction, works are classified principally by subject,

with extensions for subject relationships, place, time or type of material, producing

classification numbers of at least three digits but otherwise of indeterminate length

with a decimal point before the fourth digit, where present (e.g. 330 for economics

+ .9 for geographic treatment + .04 for Europe = 330.94 European economy; 973 for

United States + .05 form division for periodicals = 973.05 periodicals concerning the

United States generally).

Books are placed on the shelf in increasing numerical order of the decimal number,

e.g. 050, 220, 330, 330.973, 331. When two books have the same classification

number the second line of the call number (usually the first letter or letters of the

author's last name, the title if there is no identifiable author) is placed in alphabetical

order.

It is a common misconception that all books in the DDC are non-fiction. The DDC

has a number for all books, including fiction: American fiction is classified in 813.

Most libraries create a separate fiction section to allow shelving in a more

generalized fashion than Dewey provides for, or to avoid the space that would be

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taken up in the 800s.

Classes The system is made up of ten main classes or categories, each divided into ten

secondary classes or subcategories, each having ten subdivisions.

000 – Computer science, information, and general works

100 – Philosophy and psychology

200 – Religion

300 – Social sciences

400 – Languages

500 – Science and Mathematics

600 – Technology and applied science

700 – Arts and recreation

800 – Literature

900 – History and geography and biography

The classification of books in the school library is using Dewey Decimal

Classification.