'Fourth normal form' diaporamas de présentation

Unit 7 Logical Database Design With Normalization

Unit 7 Logical Database Design With Normalization. Normalization in Context. Logical Database Design. We are given a set of tables specifying the database The base tables, which probably are the community (conceptual) level They may have come from some ER diagram or from somewhere else

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Lecture 14: Database Design

Prof. Ray Larson & Prof. Marc Davis UC Berkeley SIMS Tuesday and Thursday 10:30 am - 12:00 pm Fall 2002 http://www.sims.berkeley.edu/academics/courses/is202/f02/. Lecture 14: Database Design. SIMS 202: Information Organization and Retrieval. Lecture Overview. Review

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Normalization of Database Tables

Normalization of Database Tables. Contn. SURROGATE KEY CONSIDERATIONS. Although this design meets the vital entity and referential integrity requirements, the designer must still address some concerns .

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Database Systems: Design, Implementation, and Management Tenth Edition

Database Systems: Design, Implementation, and Management Tenth Edition. Chapter 6 Normalization of Database Tables. Objectives. In this chapter, students will learn: What normalization is and what role it plays in the database design process

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Chapter 7: Relational Database Design

Chapter 7: Relational Database Design. Chapter 7: Relational Database Design. First Normal Form Pitfalls in Relational Database Design Functional Dependencies Decomposition Boyce-Codd Normal Form Third Normal Form Multivalued Dependencies and Fourth Normal Form

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Unit 18 More on Normalization ( ?? ?? ? ?? )

Unit 18 More on Normalization ( ?? ?? ? ?? ). Contents. 18.1 Introduction 18.2 Functional Dependency 18.3 First, Second, and Third Normal Forms (1NF, 2NF, 3NF) 18.4 Boyce/ Codd Normal Form (BCNF) 18.5 Fourth Normal Form (4NF) 18.6 Fifth Normal Form (5NF ).

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Database Design and Maintenance

Database Design and Maintenance. Review. Proper database design ensures that the data is represented properly, tables are joined correctly, and that data can be easily and accurately retrieved. Review. Relational Database Terms. Relation = Table Tuple = Row Attribute = Field. Review.

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Analisis dan Perancangan Perangkat Lunak

Analisis dan Perancangan Perangkat Lunak. PEMODELAN DATA . Quit. Konsep Pemodelan Data. 1. PEMODELAN DATA DENGAN E/R DIAGRAM. The data model also describes the relationship among data and any constraints that have to be defined on the data.

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Chapter 6: Functional Dependencies & Normalization

Chapter 6: Functional Dependencies & Normalization. Dr. Hassan Ismail Abdalla. Objectives. Normalisation is a technique for analyzing and modelling data within an organisation It aims to facilitate the use of shared information by reducing the amount of redundancy in stored data

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Database Design 1: Normalization

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Chapter 7: Relational Database Design

CS157B. Lecture 8 MVD. Chapter 7: Relational Database Design. Example R = ( student_id, student_name, course_id, course_name ) F = { student_id ? student_name, course_id ? course_name } { student_id, course_id } is a candidate key. F c = F R 1 = ( student_id, student_name )

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Normalization

Normalization. Stanislava Armstrong http://www.cs.nott.ac.uk/~saw/teaching/G64DBS/lecture_slides.html. Last Lecture. Determine the outcome from executing each of the following statements on the Holidays table below:. SELECT Destination, COUNT(*) FROM Holiday WHERE ISNULL(Price) = TRUE

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Multivalued Dependencies

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Normalization

Normalization. Lecture 12 Inst: Haya Sammaneh. Objectives of Normalization. How tables that contain redundant data can suffer from update anomalies, which can introduce inconsistencies into a database.

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4 TH NORMAL FORM

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Multivalued Dependencies

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Multivalued Dependencies

Multivalued Dependencies. Fourth Normal Form. Definition of MVD.

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Systems Analysis & Design Methods

Systems Analysis & Design Methods. 4 th normal form. Fourth Normal Form: no multi-valued dependencies.

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