By Helen Spiropoulos

This database models the UTS Library Website: www.lib.uts.edu.au

It allows users to search for resources (book, journal, dvd, cd etc) by subject, author, title, category and publisher.

Staff can check if students have loans overdue and also when student cards expire. They can also access the sales contact of publishers if an item needs replacing.

The attributes in each table allow for an extensive range of queries.

LIB_Category

catIDcatDesc

LIB_Resource

ISBNTitleEditionPubID*YearPubMediaCopies

LIB_Subject

SubNoSubNameFalculty

LIB_ResSubject

SubNo*ISBN*

LIB_Author

AuIDAuNameBirthDeathGender

LIB_ResCategory

catID*ISBN*

LIB_ResAuthor

AuID*ISBN*AuNo

LIB_Publisher

PubIDPubNameSalesContact

LIB_Student

StuIDStuNameEmailExpirary

LIB_Copy

ISBN*CopyNo

LIB_Loan

(ISBN*CopyNo*)StuID*DateLoanDateDue

One to Many Relationship

pubID PubName SalesContact

1 Wiley

2 Prentice Hall

3 Pearson Education

4 McGraw-Hill

5 East Sussex

6 Everbest sales@everbest.com

ISBN Title Edition

PubID Year Media

Copies

0131451413

Database concepts 2 3 2005 book 1

1256748844 Managing a Corporate Enterprise 3 3 2005 dvd 1

• One publisher can publish many resources

Primary Key

Foreign Key

SubNoSubNameFaculty

LIB_Subject

SubNo*ISBN*

LIB_ResSubject

ISBNTitleEdPubIDYearPubMediaCopies

LIB_Resource

Many to Many Relationship

SubNo ISBN

31061 0471347116

31061 0131451413

31061 0072880678

21121 0471180327

31474 0072880678

subNo

subName Falculty

31061 Database Principles Information Technology

21121 Managing electronic business processes Information Technology

ISBN Title Ed pubID

Year

Media

Copies

0131451413

Database concepts 2 3 2005

book 1

0471347116

Data management : databases and organizations 4 1 2003

book 2

0072880678

Database design, application development, and administration

2 4 2004

book 4

One resource can be for many subjectsOne subject can have many resources

Query on a single entity/table

select * from LIB_author where augender = 'M';

auID auName auBirth

auDeath

augender

1 Kroenke, David M. M

2 Watson, Richard T M

3 Mannino, Micheal V. M

4 McKeown, Patrick G. 1943 M

5 Hartas, Leo M

6 Prentice, Steve M

select isbn, media from LIB_resource where media <> 'book';

ISBN Media

1256748844 dvd

1246450099M magazine

Select all resources other than books

Select all male authors

Query using Natural Join

select subname, title, copies from lib_resource

natural join lib_ressubject natural join lib_subject

Where falculty = ‘Information Technology’;

subName Title Copies

Database Principles Database concepts 1

Database Principles Data management : databases and organizations 2

Database Fundamentals Database design, application development, and administration 4

Database Principles Database design, application development, and administration 4

Managing Electronic Business Processes

Metamorphosis : a guide to the World Wide Web & electronic commerce

1

List subject, resource and copies of all resources currently usedby the faculty of Information Technology

select subname, title, copies from lib_resource, lib_subject, lib_ressubject

where lib_resource.isbn = lib_ressubject.isbn and

lib_subject.subno = lib_ressubject.subno

and faculty = 'Information Technology';

subName Title Copies

Database Principles Database concepts 1

Database Principles Data management : databases and organizations 2

Database Fundamentals Database design, application development, and administration 4

Database Principles Database design, application development, and administration 4

Managing Electronic Business Processes

Metamorphosis : a guide to the World Wide Web & electronic commerce

1

Query using Cross Product

Group By using Having

show the authors who have authored more than 1 resource

select auname, count(*) from lib_author, lib_resauthor, lib_resource

where lib_resource.isbn = lib_resauthor.isbn

and lib_resauthor.auID = lib_author.auID

group by auname having count(*) > 1;

auName Count

Jones, Katee K. 2

Watson, Richard T. 2

Query using a Sub Query

select auname, aubirth from lib_author where aubirth <= all

(select aubirth from lib_author

where audeath is null and aubirth is not null);

auName auBirth

McKeown, Patrick G. 1943

show the ‘known’ oldest author who is still alive

Self Join

Select all authors who authored two books (assuming no author hasAuthored more than two books) and the ISBN of each book.

select au.auname, resau1.isbn as book1, resau2.isbn as book2

from lib_resauthor resau1, lib_resauthor resau2, lib_author au

where resau1.auid = au.au and resau2.auid = au.auid

and resau1.isbn < resau2.isbn;

auName Book1 Book2

Watson, Richard T. 0471180327 0471347116

Jones, Katee K. 1246450099M 1256748844

Data Integrity – CHECK Constraints

Create table LIB_Author (

values go here….

auBirth CHAR(4),

auDeath CHAR(4),

auGender TEXT,

CONSTRAINT LIB_Author_AuBirth CHECK ((AuBirth < AuDeath) AND

(AuBirth >= 0000) AND (AuBirth <= 9999)),

CONSTRAINT LIB_Author_AuDeath CHEck (AuDeath > AuBirth),

CONSTRAINT LIB_Author_AuGender CHECK (AuGender IN ('M','F'))

);

SQL Syntax for Actions

Create table LIB_ResCategory(catID INTEGER,ISBN TEXT,

CONSTRAINT LIB_ResCategoryPk PRIMARY KEY (CatID,ISBN),

CONSTRAINT LIB_ResCategoryFk_INVALID_ISBN FOREIGN KEY (ISBN) REFERENCES LIB_Resource (ISBN)

ON DELETE CASCADEON UPDATE CASCADE,

CONSTRAINT LIB_ResCategoryFk_INVALID_CatID FOREIGN KEY (CatID) REFERENCES LIB_Category (CatID)

ON DELETE RESTRICTON UPDATE CASCADE

);

This will delete/update theentry of the isbn inLib_rescategory if theresource is deleted/updated from Lib_resource

This will restrict the deletion of a category ifthere are still resources in the category. Itwill also update any changes in catID fromLIB_category to the matching catID in LIB_resCategory.

Creating a View

create view booksonloan (isbn, title, copyno, daysout, due) as select

lib_loan.isbn, title, lib_loan.copyno, '07 June, 2007' - dateloan, datedue

from lib_resource, lib_copy, lib_loan where

lib_resource.isbn = lib_copy.isbn and lib_copy.copyno = lib_loan.copyno

and lib_copy.isbn = lib_loan.isbn;

ISBN Title copyNo DaysOut Due

0471347116 Data management : databases and organizations 1 13 2007-06-25

0471347116 Data management : databases and organizations 2 10 2007-06-28

0131451413 Database concepts 1 33 2007-06-05

1246450099M

Greece and why it rocks 1 13 2007-06-25