Submit Search
Upload
The Database Environment Chapter 15
•
Download as PPT, PDF
•
0 likes
•
331 views
J
Jeanie Arnoco
Follow
The Database Environment Chapter 15
Read less
Read more
Education
Report
Share
Report
Share
1 of 25
Download now
Recommended
The Database Environment Chapter 8
The Database Environment Chapter 8
Jeanie Arnoco
The Database Environment Chapter 11
The Database Environment Chapter 11
Jeanie Arnoco
The Database Environment Chapter 10
The Database Environment Chapter 10
Jeanie Arnoco
The Database Environment Chapter 14
The Database Environment Chapter 14
Jeanie Arnoco
The Database Environment Chapter 6
The Database Environment Chapter 6
Jeanie Arnoco
Dbms ii mca-ch7-sql-2013
Dbms ii mca-ch7-sql-2013
Prosanta Ghosh
Sql intro & ddl 1
Sql intro & ddl 1
Dr. C.V. Suresh Babu
Dwh lecture-07-denormalization
Dwh lecture-07-denormalization
Sulman Ahmed
Recommended
The Database Environment Chapter 8
The Database Environment Chapter 8
Jeanie Arnoco
The Database Environment Chapter 11
The Database Environment Chapter 11
Jeanie Arnoco
The Database Environment Chapter 10
The Database Environment Chapter 10
Jeanie Arnoco
The Database Environment Chapter 14
The Database Environment Chapter 14
Jeanie Arnoco
The Database Environment Chapter 6
The Database Environment Chapter 6
Jeanie Arnoco
Dbms ii mca-ch7-sql-2013
Dbms ii mca-ch7-sql-2013
Prosanta Ghosh
Sql intro & ddl 1
Sql intro & ddl 1
Dr. C.V. Suresh Babu
Dwh lecture-07-denormalization
Dwh lecture-07-denormalization
Sulman Ahmed
Normalization case
Normalization case
Prosanta Ghosh
Data Manipulation Language
Data Manipulation Language
Jas Singh Bhasin
Sql DML
Sql DML
Vikas Gupta
Denormalization
Denormalization
Amna Magzoub
Rdbms
Rdbms
argusacademy
SQL
SQL
Vineeta Garg
Ch 12 O O D B Dvlpt
Ch 12 O O D B Dvlpt
guest8fdbdd
When & Why\'s of Denormalization
When & Why\'s of Denormalization
Aliya Saldanha
Sql commands
Sql commands
Balakumaran Arunachalam
10.1.1.118.8129
10.1.1.118.8129
Julius Francisco
Data integrity
Data integrity
Rahul Gupta
Sql server ___________session 3(sql 2008)
Sql server ___________session 3(sql 2008)
Ehtisham Ali
An Overview on Data Quality Issues at Data Staging ETL
An Overview on Data Quality Issues at Data Staging ETL
idescitation
Normalization of database_tables_chapter_4
Normalization of database_tables_chapter_4
Farhan Chishti
Dbms relational model
Dbms relational model
Chirag vasava
Database Systems - SQL - DCL Statements (Chapter 3/4)
Database Systems - SQL - DCL Statements (Chapter 3/4)
Vidyasagar Mundroy
DML, DDL, DCL ,DRL/DQL and TCL Statements in SQL with Examples
DML, DDL, DCL ,DRL/DQL and TCL Statements in SQL with Examples
LGS, GBHS&IC, University Of South-Asia, TARA-Technologies
SQL DDL
SQL DDL
Vikas Gupta
Dbms ii mca-ch8-db design-2013
Dbms ii mca-ch8-db design-2013
Prosanta Ghosh
Sql ch 9 - data integrity
Sql ch 9 - data integrity
Mukesh Tekwani
Dbms ii mca-ch4-relational model-2013
Dbms ii mca-ch4-relational model-2013
Prosanta Ghosh
2 rel-algebra
2 rel-algebra
Mahesh Jeedimalla
More Related Content
What's hot
Normalization case
Normalization case
Prosanta Ghosh
Data Manipulation Language
Data Manipulation Language
Jas Singh Bhasin
Sql DML
Sql DML
Vikas Gupta
Denormalization
Denormalization
Amna Magzoub
Rdbms
Rdbms
argusacademy
SQL
SQL
Vineeta Garg
Ch 12 O O D B Dvlpt
Ch 12 O O D B Dvlpt
guest8fdbdd
When & Why\'s of Denormalization
When & Why\'s of Denormalization
Aliya Saldanha
Sql commands
Sql commands
Balakumaran Arunachalam
10.1.1.118.8129
10.1.1.118.8129
Julius Francisco
Data integrity
Data integrity
Rahul Gupta
Sql server ___________session 3(sql 2008)
Sql server ___________session 3(sql 2008)
Ehtisham Ali
An Overview on Data Quality Issues at Data Staging ETL
An Overview on Data Quality Issues at Data Staging ETL
idescitation
Normalization of database_tables_chapter_4
Normalization of database_tables_chapter_4
Farhan Chishti
Dbms relational model
Dbms relational model
Chirag vasava
Database Systems - SQL - DCL Statements (Chapter 3/4)
Database Systems - SQL - DCL Statements (Chapter 3/4)
Vidyasagar Mundroy
DML, DDL, DCL ,DRL/DQL and TCL Statements in SQL with Examples
DML, DDL, DCL ,DRL/DQL and TCL Statements in SQL with Examples
LGS, GBHS&IC, University Of South-Asia, TARA-Technologies
SQL DDL
SQL DDL
Vikas Gupta
Dbms ii mca-ch8-db design-2013
Dbms ii mca-ch8-db design-2013
Prosanta Ghosh
Sql ch 9 - data integrity
Sql ch 9 - data integrity
Mukesh Tekwani
What's hot
(20)
Normalization case
Normalization case
Data Manipulation Language
Data Manipulation Language
Sql DML
Sql DML
Denormalization
Denormalization
Rdbms
Rdbms
SQL
SQL
Ch 12 O O D B Dvlpt
Ch 12 O O D B Dvlpt
When & Why\'s of Denormalization
When & Why\'s of Denormalization
Sql commands
Sql commands
10.1.1.118.8129
10.1.1.118.8129
Data integrity
Data integrity
Sql server ___________session 3(sql 2008)
Sql server ___________session 3(sql 2008)
An Overview on Data Quality Issues at Data Staging ETL
An Overview on Data Quality Issues at Data Staging ETL
Normalization of database_tables_chapter_4
Normalization of database_tables_chapter_4
Dbms relational model
Dbms relational model
Database Systems - SQL - DCL Statements (Chapter 3/4)
Database Systems - SQL - DCL Statements (Chapter 3/4)
DML, DDL, DCL ,DRL/DQL and TCL Statements in SQL with Examples
DML, DDL, DCL ,DRL/DQL and TCL Statements in SQL with Examples
SQL DDL
SQL DDL
Dbms ii mca-ch8-db design-2013
Dbms ii mca-ch8-db design-2013
Sql ch 9 - data integrity
Sql ch 9 - data integrity
Similar to The Database Environment Chapter 15
Dbms ii mca-ch4-relational model-2013
Dbms ii mca-ch4-relational model-2013
Prosanta Ghosh
2 rel-algebra
2 rel-algebra
Mahesh Jeedimalla
DBMS Unit-2.pdf
DBMS Unit-2.pdf
vaishnavi339314
21792 relational database managementsystem
21792 relational database managementsystem
Universitas Bina Darma Palembang
4_RelationalDataModelAndRelationalMapping.pdf
4_RelationalDataModelAndRelationalMapping.pdf
LPhct2
Oracle - Program with PL/SQL - Lession 02
Oracle - Program with PL/SQL - Lession 02
Thuan Nguyen
Presentation on c structures
Presentation on c structures
topu93
Presentation on c programing satcture
Presentation on c programing satcture
topu93
ch3.ppt
ch3.ppt
Ashwini Rao
Software engg. pressman_ch-11
Software engg. pressman_ch-11
Dhairya Joshi
MIS5101 WK10 Outcome Measures
MIS5101 WK10 Outcome Measures
Steven Johnson
RDB-fundamentals-1-intro.ppt
RDB-fundamentals-1-intro.ppt
THEFPS
Chapter 7 relation database language
Chapter 7 relation database language
Jafar Nesargi
Relational database language
Relational database language
Jafar Nesargi
Assignment # 2PreliminariesImportant Points· Evidence of acad.docx
Assignment # 2PreliminariesImportant Points· Evidence of acad.docx
jane3dyson92312
Chapter 7 relation database language
Chapter 7 relation database language
Jafar Nesargi
Fundamentals of database system - Relational data model and relational datab...
Fundamentals of database system - Relational data model and relational datab...
Mustafa Kamel Mohammadi
COQUEL: A CONCEPTUAL QUERY LANGUAGE BASED ON THE ENTITYRELATIONSHIP MODEL
COQUEL: A CONCEPTUAL QUERY LANGUAGE BASED ON THE ENTITYRELATIONSHIP MODEL
csandit
COQUEL: A CONCEPTUAL QUERY LANGUAGE BASED ON THE ENTITYRELATIONSHIP MODEL
COQUEL: A CONCEPTUAL QUERY LANGUAGE BASED ON THE ENTITYRELATIONSHIP MODEL
cscpconf
Analysing Performance of Algorithmic SQL and PLSQL.pptx
Analysing Performance of Algorithmic SQL and PLSQL.pptx
Brendan Furey
Similar to The Database Environment Chapter 15
(20)
Dbms ii mca-ch4-relational model-2013
Dbms ii mca-ch4-relational model-2013
2 rel-algebra
2 rel-algebra
DBMS Unit-2.pdf
DBMS Unit-2.pdf
21792 relational database managementsystem
21792 relational database managementsystem
4_RelationalDataModelAndRelationalMapping.pdf
4_RelationalDataModelAndRelationalMapping.pdf
Oracle - Program with PL/SQL - Lession 02
Oracle - Program with PL/SQL - Lession 02
Presentation on c structures
Presentation on c structures
Presentation on c programing satcture
Presentation on c programing satcture
ch3.ppt
ch3.ppt
Software engg. pressman_ch-11
Software engg. pressman_ch-11
MIS5101 WK10 Outcome Measures
MIS5101 WK10 Outcome Measures
RDB-fundamentals-1-intro.ppt
RDB-fundamentals-1-intro.ppt
Chapter 7 relation database language
Chapter 7 relation database language
Relational database language
Relational database language
Assignment # 2PreliminariesImportant Points· Evidence of acad.docx
Assignment # 2PreliminariesImportant Points· Evidence of acad.docx
Chapter 7 relation database language
Chapter 7 relation database language
Fundamentals of database system - Relational data model and relational datab...
Fundamentals of database system - Relational data model and relational datab...
COQUEL: A CONCEPTUAL QUERY LANGUAGE BASED ON THE ENTITYRELATIONSHIP MODEL
COQUEL: A CONCEPTUAL QUERY LANGUAGE BASED ON THE ENTITYRELATIONSHIP MODEL
COQUEL: A CONCEPTUAL QUERY LANGUAGE BASED ON THE ENTITYRELATIONSHIP MODEL
COQUEL: A CONCEPTUAL QUERY LANGUAGE BASED ON THE ENTITYRELATIONSHIP MODEL
Analysing Performance of Algorithmic SQL and PLSQL.pptx
Analysing Performance of Algorithmic SQL and PLSQL.pptx
More from Jeanie Arnoco
The Database Environment Chapter 13
The Database Environment Chapter 13
Jeanie Arnoco
The Database Environment Chapter 12
The Database Environment Chapter 12
Jeanie Arnoco
The Database Environment Chapter 9
The Database Environment Chapter 9
Jeanie Arnoco
The Database Environment Chapter 7
The Database Environment Chapter 7
Jeanie Arnoco
The Database Environment Chapter 5
The Database Environment Chapter 5
Jeanie Arnoco
The Database Environment Chapter 4
The Database Environment Chapter 4
Jeanie Arnoco
The Database Environment Chapter 3
The Database Environment Chapter 3
Jeanie Arnoco
The Database Environment Chapter 2
The Database Environment Chapter 2
Jeanie Arnoco
The Database Environment Chapter 1
The Database Environment Chapter 1
Jeanie Arnoco
Introduction to BOOTSTRAP
Introduction to BOOTSTRAP
Jeanie Arnoco
Introduction to programming using Visual Basic 6
Introduction to programming using Visual Basic 6
Jeanie Arnoco
Hacking and Online Security
Hacking and Online Security
Jeanie Arnoco
(CAR)Cordillera Administrative Region
(CAR)Cordillera Administrative Region
Jeanie Arnoco
Quick sort-Data Structure
Quick sort-Data Structure
Jeanie Arnoco
Quality Gurus Student
Quality Gurus Student
Jeanie Arnoco
QUALITY STANDARDS
QUALITY STANDARDS
Jeanie Arnoco
Partnering for Competition: External Partnership
Partnering for Competition: External Partnership
Jeanie Arnoco
Partnering for Competition:Internal Partnership
Partnering for Competition:Internal Partnership
Jeanie Arnoco
CROSBY’S PHILOSOPHY
CROSBY’S PHILOSOPHY
Jeanie Arnoco
Juran’s Trilogy
Juran’s Trilogy
Jeanie Arnoco
More from Jeanie Arnoco
(20)
The Database Environment Chapter 13
The Database Environment Chapter 13
The Database Environment Chapter 12
The Database Environment Chapter 12
The Database Environment Chapter 9
The Database Environment Chapter 9
The Database Environment Chapter 7
The Database Environment Chapter 7
The Database Environment Chapter 5
The Database Environment Chapter 5
The Database Environment Chapter 4
The Database Environment Chapter 4
The Database Environment Chapter 3
The Database Environment Chapter 3
The Database Environment Chapter 2
The Database Environment Chapter 2
The Database Environment Chapter 1
The Database Environment Chapter 1
Introduction to BOOTSTRAP
Introduction to BOOTSTRAP
Introduction to programming using Visual Basic 6
Introduction to programming using Visual Basic 6
Hacking and Online Security
Hacking and Online Security
(CAR)Cordillera Administrative Region
(CAR)Cordillera Administrative Region
Quick sort-Data Structure
Quick sort-Data Structure
Quality Gurus Student
Quality Gurus Student
QUALITY STANDARDS
QUALITY STANDARDS
Partnering for Competition: External Partnership
Partnering for Competition: External Partnership
Partnering for Competition:Internal Partnership
Partnering for Competition:Internal Partnership
CROSBY’S PHILOSOPHY
CROSBY’S PHILOSOPHY
Juran’s Trilogy
Juran’s Trilogy
Recently uploaded
ECONOMIC CONTEXT - LONG FORM TV DRAMA - PPT
ECONOMIC CONTEXT - LONG FORM TV DRAMA - PPT
iammrhaywood
How to do quick user assign in kanban in Odoo 17 ERP
How to do quick user assign in kanban in Odoo 17 ERP
Celine George
Model Call Girl in Bikash Puri Delhi reach out to us at 🔝9953056974🔝
Model Call Girl in Bikash Puri Delhi reach out to us at 🔝9953056974🔝
9953056974 Low Rate Call Girls In Saket, Delhi NCR
Full Stack Web Development Course for Beginners
Full Stack Web Development Course for Beginners
Sabitha Banu
Rapple "Scholarly Communications and the Sustainable Development Goals"
Rapple "Scholarly Communications and the Sustainable Development Goals"
National Information Standards Organization (NISO)
Hierarchy of management that covers different levels of management
Hierarchy of management that covers different levels of management
mkooblal
TataKelola dan KamSiber Kecerdasan Buatan v022.pdf
TataKelola dan KamSiber Kecerdasan Buatan v022.pdf
Sarwono Sutikno, Dr.Eng.,CISA,CISSP,CISM,CSX-F
DATA STRUCTURE AND ALGORITHM for beginners
DATA STRUCTURE AND ALGORITHM for beginners
Sabitha Banu
Earth Day Presentation wow hello nice great
Earth Day Presentation wow hello nice great
YousafMalik24
ENGLISH 7_Q4_LESSON 2_ Employing a Variety of Strategies for Effective Interp...
ENGLISH 7_Q4_LESSON 2_ Employing a Variety of Strategies for Effective Interp...
JhezDiaz1
Computed Fields and api Depends in the Odoo 17
Computed Fields and api Depends in the Odoo 17
Celine George
How to Configure Email Server in Odoo 17
How to Configure Email Server in Odoo 17
Celine George
AMERICAN LANGUAGE HUB_Level2_Student'sBook_Answerkey.pdf
AMERICAN LANGUAGE HUB_Level2_Student'sBook_Answerkey.pdf
phamnguyenenglishnb
OS-operating systems- ch04 (Threads) ...
OS-operating systems- ch04 (Threads) ...
Dr. Mazin Mohamed alkathiri
EPANDING THE CONTENT OF AN OUTLINE using notes.pptx
EPANDING THE CONTENT OF AN OUTLINE using notes.pptx
RaymartEstabillo3
Model Call Girl in Tilak Nagar Delhi reach out to us at 🔝9953056974🔝
Model Call Girl in Tilak Nagar Delhi reach out to us at 🔝9953056974🔝
9953056974 Low Rate Call Girls In Saket, Delhi NCR
Difference Between Search & Browse Methods in Odoo 17
Difference Between Search & Browse Methods in Odoo 17
Celine George
Field Attribute Index Feature in Odoo 17
Field Attribute Index Feature in Odoo 17
Celine George
9953330565 Low Rate Call Girls In Rohini Delhi NCR
9953330565 Low Rate Call Girls In Rohini Delhi NCR
9953056974 Low Rate Call Girls In Saket, Delhi NCR
MULTIDISCIPLINRY NATURE OF THE ENVIRONMENTAL STUDIES.pptx
MULTIDISCIPLINRY NATURE OF THE ENVIRONMENTAL STUDIES.pptx
Anupkumar Sharma
Recently uploaded
(20)
ECONOMIC CONTEXT - LONG FORM TV DRAMA - PPT
ECONOMIC CONTEXT - LONG FORM TV DRAMA - PPT
How to do quick user assign in kanban in Odoo 17 ERP
How to do quick user assign in kanban in Odoo 17 ERP
Model Call Girl in Bikash Puri Delhi reach out to us at 🔝9953056974🔝
Model Call Girl in Bikash Puri Delhi reach out to us at 🔝9953056974🔝
Full Stack Web Development Course for Beginners
Full Stack Web Development Course for Beginners
Rapple "Scholarly Communications and the Sustainable Development Goals"
Rapple "Scholarly Communications and the Sustainable Development Goals"
Hierarchy of management that covers different levels of management
Hierarchy of management that covers different levels of management
TataKelola dan KamSiber Kecerdasan Buatan v022.pdf
TataKelola dan KamSiber Kecerdasan Buatan v022.pdf
DATA STRUCTURE AND ALGORITHM for beginners
DATA STRUCTURE AND ALGORITHM for beginners
Earth Day Presentation wow hello nice great
Earth Day Presentation wow hello nice great
ENGLISH 7_Q4_LESSON 2_ Employing a Variety of Strategies for Effective Interp...
ENGLISH 7_Q4_LESSON 2_ Employing a Variety of Strategies for Effective Interp...
Computed Fields and api Depends in the Odoo 17
Computed Fields and api Depends in the Odoo 17
How to Configure Email Server in Odoo 17
How to Configure Email Server in Odoo 17
AMERICAN LANGUAGE HUB_Level2_Student'sBook_Answerkey.pdf
AMERICAN LANGUAGE HUB_Level2_Student'sBook_Answerkey.pdf
OS-operating systems- ch04 (Threads) ...
OS-operating systems- ch04 (Threads) ...
EPANDING THE CONTENT OF AN OUTLINE using notes.pptx
EPANDING THE CONTENT OF AN OUTLINE using notes.pptx
Model Call Girl in Tilak Nagar Delhi reach out to us at 🔝9953056974🔝
Model Call Girl in Tilak Nagar Delhi reach out to us at 🔝9953056974🔝
Difference Between Search & Browse Methods in Odoo 17
Difference Between Search & Browse Methods in Odoo 17
Field Attribute Index Feature in Odoo 17
Field Attribute Index Feature in Odoo 17
9953330565 Low Rate Call Girls In Rohini Delhi NCR
9953330565 Low Rate Call Girls In Rohini Delhi NCR
MULTIDISCIPLINRY NATURE OF THE ENVIRONMENTAL STUDIES.pptx
MULTIDISCIPLINRY NATURE OF THE ENVIRONMENTAL STUDIES.pptx
The Database Environment Chapter 15
1.
1 © Prentice Hall,
2002 Chapter 15:Chapter 15: Object-Oriented DatabaseObject-Oriented Database DevelopmentDevelopment Modern Database Management 6th Edition Jeffrey A. Hoffer, Mary B. Prescott, Fred R. McFadden
2.
2Chapter 15 ©
Prentice Hall, Object Definition LanguageObject Definition Language (ODL)(ODL) Corresponds to SQL’s DDL (Data Definition Language) Specify the logical schema for an object- oriented database Based on the specifications of Object Database Management Group (ODMG)
3.
3Chapter 15 ©
Prentice Hall, Defining a ClassDefining a Class classclass – keyword for defining classes attributeattribute – keyword for attributes operationsoperations – return type, name, parameters in parentheses relationshiprelationship – keyword for establishing relationship
4.
4Chapter 15 ©
Prentice Hall, Defining an AttributeDefining an Attribute Value can be either: – Object identifier OR Literal Types of literals – Atomic – a constant that cannot be decomposed into components – Collection – multiple literals or object types – Structure – a fixed number of named elements, each of which could be a literal or object type Attribute ranges – Allowable values for an attribute – enum – for enumerating the allowable values
5.
5Chapter 15 ©
Prentice Hall, Kinds of CollectionsKinds of Collections Set – unordered collection without duplicates Bag – unordered collection that may contain duplicates List – ordered collection, all the same type Array – dynamically sized ordered collection, locatable by position Dictionary – unordered sequence of key-value pairs without duplicates
6.
6Chapter 15 ©
Prentice Hall, Defining StructuresDefining Structures Structure = user-defined type with components structstruct keyword Example: struct Address {struct Address { String street_addressString street_address String city;String city; String state;String state; String zip;String zip; };};
7.
7Chapter 15 ©
Prentice Hall, Defining OperationsDefining Operations Return type Name Parentheses following the name Arguments within the parentheses
8.
8Chapter 15 ©
Prentice Hall, Defining RelationshipsDefining Relationships Only unary and binary relationships allowed Relationships are bi-directional – implemented through use of inverse keyword ODL relationships are specified: – relationship indicates that class is on many-side – relationship set indicates that class is on one-side and other class (many) instances unordered – relationship list indicates that class is on one-side and other class (many) instances ordered
9.
9Chapter 15 ©
Prentice Hall, Figure 15-1 –UML class diagram for a university database The following slides illustrate the ODL implementation of this UML diagram
10.
10Chapter 15 ©
Prentice Hall, Figure 15-2 –ODL Schema for university database
11.
11Chapter 15 ©
Prentice Hall, Figure 15-2 –ODL Schema for university database class keyword begins the class definition.Class components enclosed between { and }
12.
12Chapter 15 ©
Prentice Hall, Figure 15-2 – ODL Schema for university database attribute has a data type and a name specify allowable values using enum
13.
13Chapter 15 ©
Prentice Hall, Figure 15-2 –ODL Schema for university database extent = the set of all instances of the class
14.
14Chapter 15 ©
Prentice Hall, Figure 15-2 –ODL Schema for university database Operation definition: return type, name, and argument list. Arguments include data types and names
15.
15Chapter 15 ©
Prentice Hall, Figure 15-2 –ODL Schema for university database relationship sets indicate 1:N relationship to an unordered collection of instances of the other class inverse establishes the bidirectionality of the relationship
16.
16Chapter 15 ©
Prentice Hall, Figure 15-2 –ODL Schema for university database relationship list indicates 1:N relationship to an ordered collection of instances of the other class
17.
17Chapter 15 ©
Prentice Hall, Figure 15-2 –ODL Schema for university database relationship indicates N:1 relationship to an instance of the other class
18.
18Chapter 15 ©
Prentice Hall, Figure 15-3 – UML class diagram for an employee project database (a) Many-to-many relationship with an association class Note: In order to capture special features of assignment, this should be converted into two 1:N relationships
19.
19Chapter 15 ©
Prentice Hall, Figure 15-3 – UML class diagram for an employee project database (b) Many-to many relationship broken into two one-to-many relationships class Employee { (extent employees key emp_id) …………. attribute set (string) skills_required; }; Note: key indicates indentifier (candidate key) Note: attribute set indicates a multivalued attribute
20.
20Chapter 15 ©
Prentice Hall, Figure 15-4 UML class diagram showing employee generalization class Employee extends Employee{ ( …………. …………. } Note: extends denotes subclassing
21.
21Chapter 15 ©
Prentice Hall, Figure 15-5 –UML class diagram showing student generalization abstract class Student extends Employee{ ( …………. abstract float calc_tuition(); } Note: abstract operation denotes no method (no implementation) of calc_tuition at the Student level Note: abstract class denotes non- instantiable (complete constraint)
22.
22Chapter 15 ©
Prentice Hall, Creating Object InstancesCreating Object Instances Specify a tag that will be the object identifier – MBA699 course (); Initializing attributes: – Cheryl student (name: “Cheryl Davis”, dateOfBirth:4/5/77); Initializing multivalued attributes: – Dan employee (emp_id: 3678, name: “Dan Bellon”, skills {“Database design”, “OO Modeling”}); Establishing links for relationship – Cheryl student (takes: {OOAD99F, Telecom99F, Java99F});
23.
23Chapter 15 ©
Prentice Hall, Querying Objects in the OODBQuerying Objects in the OODB Object Query Language (OQL) ODMG standard language Similar to SQL-92 Some differences: – Joins use class’s relationship name: Select x.enrollment from courseofferings x, x.belongs_to y where y.crse_course = “MBA 664” and x.section = 1; – Using a set in a query Select emp_id, name from employees where “Database Design” in skills;
24.
24Chapter 15 ©
Prentice Hall, Current ODBMS ProductsCurrent ODBMS Products Rising popularity due to: – CAD/CAM applications – Geographic information systems – Multimedia – Web-based applications – Increasingly complex data types Applications of ODBMS – Bill-of-material – Telecommunications navigation – Health care – Engineering design – Finance and trading
25.
25Chapter 15 ©
Prentice Hall, Table15-1 – ODBMS Products
Download now