'Functionally dependent' presentation slideshows

Concepts of Database Management Seventh Edition

Concepts of Database Management Seventh Edition. Chapter 5 Database Design 1: Normalization. Objectives. Discuss functional dependence and primary keys Define first normal form, second normal form, and fourth normal form

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Database Design

Database Design. Normalization. Dr. Dian Zhang College of Computer Science and Software Engineering Shenzhen University. What you learn:. Problems related to DB design ( Anomalies ) ( ??? ) How to overcome ( Normal Form )

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Lecture 3 Functional Dependency and Normal Forms

CS157B. Lecture 3 Functional Dependency and Normal Forms. Prof. Sin-Min Lee Department of Computer Science. Database Design Process. Application 1. Application 2. Application 3. Application 4. External Model. External Model. External Model. External Model. Application 1.

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Concepts of Database Management Seventh Edition

Concepts of Database Management Seventh Edition. Chapter 5 Database Design 1: Normalization. Objectives. Discuss functional dependence and primary keys Define first normal form, second normal form, and fourth normal form

651 views • 54 slides

RELATIONAL ALGEBRA (III)

CS157A. RELATIONAL ALGEBRA (III). Prof. Sin-Min LEE Department of Computer Science. Lecture 10. Unary Relational Operations: SELECT and PROJECT. The PROJECT Operation Sequences of Operations and the RENAME Operation The SELECT Operation. Relational Algebra Operations from Set Theory.

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MOBILE DATABASE SYSTEMS

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Conceptual Model Translation

Conceptual Model Translation. Translating an ERD into a relational database schema. Conceptual model translation. Logical level models often require greater detail. Logical model may not support some conceptual constructs: e.g., no direct equivalent of many-to-many in RM

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XML Structures for Relational Data

XML Structures for Relational Data. Wenyue Du, Mong Li Lee, Tok Wang Ling Department of Computer Science School of Computing National University of Singapore {duwenyue, leeml, lingtw}@comp.nus.edu.sg. Contents. Introduction Motivation Related Works Our Approach Background XML

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11. Normalization

Section 11 # 1. 11. Normalization. Database Design is the process of finding a "good" logical structure for the database. So far, design has been maintaining well-defined relations and choosing good primary keys. Here is a review of some of the definitions:

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Lecture 12 Designing Databases

COSC4406: Software Engineering. Lecture 12 Designing Databases. 12. 1. Learning Objectives. Define each of the following database terms Relation Primary key Normalization Functional dependency Foreign key Referential integrity Field Data type Null value Denormalization

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Normalization

Normalization. Database Design is the process of finding a "good" logical structure for the database. So far, design criteria has been just maintaining well-defined relations and choosing good primary keys. Here is a review of some of the definitions:

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ABSTRACT OF FIRST LECTURE

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Chapter 3

The Relational Model and Normalization. Chapter 3. Contents. A. Sales Receipt Problem B. Solution. A. Sales Receipt Problem. DS company wants to store information of receipt for each selling time. Each receipt has following information: Receipt ID Customer ID Customer Name

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Normalization Concepts

Normalization Concepts. CIS 507 Database Programming. Introduction. Two types of Anomalies associated with databases. Modification Anomaly an unexpected consequence of changing the actual data in a database Design Anomaly a flaw in the logical design of the database itself

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Functional Dependency

Functional Dependency. CS157a Sec. 2 Koichiro Hongo. What is Functional Dependency?. A functional dependency is a constraint between two sets of attributes in a relation from a database. An attribute or set of attributes X is said to functionally determine another attribute

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Normalization and Other Data Modeling Methods

Normalization and Other Data Modeling Methods. There are many paths to the top of the mountain but the view is always the same Chinese proverb. Normalization. An alternative database design tool to data modeling A theoretical foundation for the relational model

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Introduction to Normalization Workshop

Introduction to Normalization Workshop. 10 June 2011. Normalizing a Table. Normalizing a Table. Referring to the sales invoice at the previous slide. Tabulate the information in a table. Normalizing a Table. Normalizing a Table. Normalizing a Table. Normalizing a Table.

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Normalization

Normalization. Data inconsistency, incorrectness and incompleteness is (partially) caused by redundancy. Normalization is the process of eliminating redundancy as much as possible, without losing data. Tools of Normalization. Normalization is achieved by lossless decomposition

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Principles of Relational Design

Principles of Relational Design. Chapter 12. Things can go wrong!. All the relational designs we've seen so far have been pretty good fairly small, intuitive examples E/R model not far away A carelessly designed schema can lead to big problems How do we evaluate a schema?

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Functional Dependence

Functional Dependence. In a relation including attribute A and B, B is functional dependent on A if, for every valid occurrence, the value A determines the value B An occurrence can not be used to show that a dependency is true, only that it is false A and B can be composite

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