'Functional dependencies' presentation slideshows

FUNCTIONAL DEPENDENCIES

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Lecture 8: Schema Refinement and Normal Forms; Physical Design and Tuning

Lecture 8: Schema Refinement and Normal Forms; Physical Design and Tuning. Schema Refinement Motivation Anomalies, Redundancy Decomposition: a good solution Keys and Functional Dependencies (FDs) BCNF and Redundancy Lossless Decompositions Dependency Preserving Decompositions, Projections

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Lecture 8: Schema Refinement and Normal Forms; Physical Design and Tuning

Lecture 8: Schema Refinement and Normal Forms; Physical Design and Tuning. Schema Refinement Motivation Anomalies, Redundancy Decomposition: a good solution Keys and Functional Dependencies (FDs) BCNF and Redundancy Lossless Decompositions Dependency Preserving Decompositions, Projections

834 views • 59 slides

CHAPTER 15 Relational Database Design Algorithms and Further Dependencies

CHAPTER 15 Relational Database Design Algorithms and Further Dependencies. Chapter Outline. 1. Further topics in Functional Dependencies 1.1 Inference Rules for FDs 1.2 Equivalence of Sets of FDs 1.3 Minimal Sets of FDs 2. Properties of Relational Decompositions

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CHAPTER 15 Relational Database Design Algorithms and Further Dependencies

CHAPTER 15 Relational Database Design Algorithms and Further Dependencies. Chapter Outline. 1. Further topics in Functional Dependencies 1.1 Inference Rules for FDs 1.2 Equivalence of Sets of FDs 1.3 Minimal Sets of FDs 2. Properties of Relational Decompositions

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Chapter 6: Logical database design and the relational model

Chapter 6: Logical database design and the relational model. Objectives of logical design. Translate the conceptual design into a logical database design that can be implemented on a chosen DBMS Input: conceptual model (ERD) Output: relational schema, normalized relations

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Chapter 10 Designing Databases

Modern Systems Analysis and Design Fourth Edition Jeffrey A. Hoffer Joey F. George Joseph S. Valacich. Chapter 10 Designing Databases. Logical Database Design. Based upon the conceptual data model Four key steps

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Am J Respir Crit Care Med 14 March 2016

The RECOVER Program: Disability Risk Groups and One Year Outcome After > 7 Days of Mechanical Ventilation. Am J Respir Crit Care Med 14 March 2016. INTRODUCTION. Patients who survive critical illness have important long-term disability Functional Neuropsychological

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Functional Dependencies and Normalization for Relational Databases

Functional Dependencies and Normalization for Relational Databases. Dr. Ali Obaidi CS-450 Fall 2002 . Informal Design Guidelines for Relational Databases. R elational database design: The grouping of attributes to form "good" relation schemas Two levels of relation schemas:

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Database Normalization

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Normalization

Normalization. Why Normalization?. To remove potential redundancy in design Redundancy causes several anomalies : insert, delete and update Redundancy wastes storage, and often slows down query processing Examples to follow next. What is Normalization?.

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Functional Dependencies- Examples

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CMSC424: Review

CMSC424: Review. Database Management Systems. Manage data Store data Update data Answer questions about the data. What kind of data ?. Enterprise data Banking Supermarkets, Sales Airlines Universities Manufacturing Human resources More recent: Semi-structured Data (XML)

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Decomposition

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DATABASES

DATABASES. Jyh-haw Yeh Dept. of Computer Science Boise State University. What is a database?. A collection of related data, stored in a structured way. It represents some aspects of real world. Databases are created and maintained by a DBMS (DataBase Management System).

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Final Review Topics

Final Review Topics. Chapter 4 SQL, Chapter 7 Relational-Database Design, Chapter 11 Storage and File Structure, Chapter 12 Indexing and Hashing, Chapter 15 Transactions, Chapter 16 Concurrency Control. SQL. Emphasis on Aggregate Functions, Nested Subqueries, DB Modifications, and DDL.

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Functional Dependencies for Relational Databases

Functional Dependencies for Relational Databases. Informal Design Guidelines - informal measures of quality Semantics of attributes Reducing redundant values in tuples Reducing null values in tuples Disallowing spurious tuples Functional Dependencies. Functional Dependencies - Definitions.

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