'Transitive dependency' presentation slideshows

Building the Database E-R Diagrams and Normalization of Database Tables

Building the Database E-R Diagrams and Normalization of Database Tables. MIS 304 Winter 2006. Review of Last Class. The relational database is set of linked tables. The links are accomplished by using keys: Primary keys to identify a unique value in each row (entity instance).

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Chapter 13

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Chapter 4 Functional Dependency and Normalization

Chapter 4 Functional Dependency and Normalization. 4.1. Functional Dependency. When we design a database for an enterprise, the main objective is to create an accurate representation of the data, relationships between the data and constraints on the data that is relevant to the enterprise

1.44k views • 28 slides

Chapter 5

Chapter 5. Database Design 1: Some Normalization Examples Spring 2006. Dependencies: Definitions .

611 views • 27 slides

Chapter 4

Chapter 4. Normalization of Database Tables Database Systems: Design, Implementation, and Management, Fifth Edition, Rob and Coronel. In this chapter, you will learn:. What normalization is and what role it plays in database design About the normal forms 1NF, 2NF, 3NF, BCNF, and 4NF

614 views • 27 slides

Chapter 5

Chapter 5. Database Design 1: Some Normalization Examples Spring 2012. Dependencies: Definitions .

405 views • 27 slides

Chapter 4

Chapter 4. Normalization of Database Tables Database Systems: Design, Implementation, and Management, Fifth Edition, Rob and Coronel. In this chapter, you will learn:. What normalization is and what role it plays in database design About the normal forms 1NF, 2NF, 3NF, BCNF, and 4NF

443 views • 27 slides

Chapter 5

Chapter 5. Database Design 1: Some Normalization Examples Spring 2006. Dependencies: Definitions .

428 views • 27 slides

RELATIONAL TABLE NORMALIZATION

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INFO 340

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COMP1212 Anomalies and Dependencies

COMP1212 Anomalies and Dependencies. Dr. Mabruk Ali. Semantics of the Relation Attributes. GUIDELINE 1: Informally, each tuple in a relation should represent one entity or relationship instance. (Applies to individual relations and their attributes).

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Database Normalization

Database Normalization. Learning Objective On successful completion of this Material, students will be able to: Explain about Normalization and why database need to be normalized Perform normalization from UNF until 3NF. Video: Narasi :

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Avoiding Database Anomalies

Avoiding Database Anomalies. Unnormalized Relation. 3a. First Normal Form (1NF). A relation is in first normal form if it does not contain repeating groups. Unnormalized Relation. First Normal Form (1NF). Changes to service names have to be made on each line on which the the name appears.

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Normalization (Chapter 2)

Normalization (Chapter 2). Peter Rob and Elie Semaan Databases: Design, Development, and Deployment Using Microsoft Access Second Edition. Dependencies. All key attributes must be dependent on the Primary Key (PK)

249 views • 15 slides

Lesson Objectives

Lesson Objectives. Aims You should know about: 1.3.2: ( a) Relational database, flat file, primary key, foreign key, secondary key, entity relationship modelling, normalisation and indexing. Some key terms. Indexing:

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Database Systems: Design, Implementation, and Management

Database Systems: Design, Implementation, and Management. Chapter 6 Normalization of Database Tables. Problems with unnormalized tables. Needless redundancy, hence insert, update and delete anomalies (inconsistencies) Data updates are less efficient because tables are larger

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Normalization of database model

Normalization of database model. Closure an attribute set. Given a set of attributes ? define the closure of attribute set ? under F (denoted as ? + ) as the set of attributes that are functionally depend on ? under F . Example R(A,B,C,G,H,I) F={A->B,A->C,CG->H,CG->I,B->H}

169 views • 9 slides

Normalization of database model

Normalization of database model. Closure an attribute set. Given a set of attributes ? define the closure of attribute set ? under F (denoted as ? + ) as the set of attributes that are functionally depend on ? under F . Example R(A,B,C,G,H,I) F={A->B,A->C,CG->H,CG->I,B->H}

97 views • 9 slides