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Stuff iThink that will be on the Quiz/Midterm.

Stuff iThink that will be on the Quiz/Midterm.

Stuff iThink that will be on the Quiz/Midterm. Fourth Normal Form by Andrew Yee Why 4NF? Performance We want database to take up less space. Why 4NF? To eliminate the possibility for data anomalies. Why 4NF? To reduce the need for: inserts, updates deletes Normal Forms Comparison

By paul2
(400 views)

Carnegie Mellon Univ. Dept. of Computer Science 15-415/615 - DB Applications

Carnegie Mellon Univ. Dept. of Computer Science 15-415/615 - DB Applications

Carnegie Mellon Univ. Dept. of Computer Science 15-415/615 - DB Applications. Lecture #17: Schema Refinement & Normalization - Normal Forms (R&G, ch. 19). Overview - detailed. DB design and normalization pitfalls of bad design decomposition normal forms. Goal. Design ‘good’ tables

By andrew
(884 views)

Lecture 7: Schema refinement: Normalisation

Lecture 7: Schema refinement: Normalisation

Lecture 7: Schema refinement: Normalisation. www.cl.cam.ac.uk/Teaching/current/Databases/. Decomposing relations. In previous lecture, we saw that we could ‘decompose’ the bad relation schema Data(sid,sname,address,cid,cname,grade)

By fell
(352 views)

Fourth normal form: 4NF

Fourth normal form: 4NF

Fourth normal form: 4NF. Normal forms. desirable forms for relations in DB design eliminate redundancies avoid update anomalies enforce integrity constraints in one sentence: produce a good representation of the real world formally defined, based on semantic concepts not a panacea.

By micheal
(387 views)

Decision Procedures in First Order Logic

Decision Procedures in First Order Logic

Decision Procedures in First Order Logic. Decision Procedures for Equality Logic. Outline. Introduction Definition, complexity Reducing Uninterpreted Functions to Equality Logic Using Uninterpreted Functions in proofs Simplifications Introduction to the decision procedures

By vinaya
(205 views)

Higher Normal Forms

Higher Normal Forms

Higher Normal Forms. By John Nicosia. CS 157a Fall 2007. What I Will Talk About. Define Multi-valued Dependency (MVD) MVD v. FD Armstrong's Axioms for MVD Quick Review of 1NF, 2NF, 3NF, BCNF Fourth Normal Form (4NF). Multi-valued Dependency (MVD).

By varian
(230 views)

Normalization of Database Tables

Normalization of Database Tables

Normalization of Database Tables. By Daniel Damaris Novarianto S. In this chapter, you will learn:. What normalization is and what role it plays in the database design process About the normal forms 1NF, 2NF, 3NF, BCNF, and 4NF

By hung
(308 views)

Discussion #10 Logical Equivalences

Discussion #10 Logical Equivalences

Discussion #10 Logical Equivalences. Topics. Laws Duals Manipulations / simplifications Normal forms Definitions Algebraic manipulation Converting truth functions to logic expressions. Law. Name. P  P  T P  P  F. Excluded middle law Contradiction law. P  F  P P  T  P.

By garron
(376 views)

Multivalued Dependencies & Fourth Normal Form (4NF)

Multivalued Dependencies & Fourth Normal Form (4NF)

Multivalued Dependencies & Fourth Normal Form (4NF). Zaki Malik October 28, 2008. A New Form of Redundancy. Multivalued dependencies (MVD’s) express a condition among tuples of a relation that exists when the relation is trying to represent more than one many-many relationship.

By webb
(315 views)

Functional Dependencies & Normalization

Functional Dependencies & Normalization

Functional Dependencies & Normalization. Souhad M. Daraghma. Redundancy and Normalisation. Redundant Data Can be determined from other data in the database Leads to various problems INSERT anomalies UPDATE anomalies DELETE anomalies. Redundancy and Normalisation. Normalisation

By xia
(182 views)

Normal Forms

Normal Forms

Normal Forms. Chomsky Normal Form Griebach Normal Form. Language preserving transformations Improve parsing efficiency Prove properties about languages and derivations. Shorter derivations. Elimination of l- rules. Reduces the length of the derivation.

By shaman
(190 views)

Normalization Hussam Eldin Najib CS Department An-Najah National University

Normalization Hussam Eldin Najib CS Department An-Najah National University

Normalization Hussam Eldin Najib CS Department An-Najah National University. Introduction. The purpose of normalization is to design “good” database schemas; normalized schemas avoid certain types of anomaly

By wayde
(138 views)

Database Systems Normalization of Database Tables

Database Systems Normalization of Database Tables

Database Systems Normalization of Database Tables. In this lecture, you will learn:. What normalization is and what role it plays in the database design process About the normal forms 1NF, 2NF, 3NF, BCNF, and 4NF

By elom
(195 views)

Database Systems Normalization of Database Tables

Database Systems Normalization of Database Tables

Database Systems Normalization of Database Tables. In this lecture, you will learn:. What normalization is and what role it plays in the database design process About the normal forms 1NF, 2NF, 3NF, BCNF, and 4NF

By vasilis
(211 views)

Schema Refinement and Normal Forms

Schema Refinement and Normal Forms

Schema Refinement and Normal Forms. Chapter 19. The Evils of Redundancy. Redundancy is at the root of several problems associated with relational schemas: redundant storage, insert/delete/update anomalies Main refinement technique: decomposition

By Samuel
(160 views)

Normalization and Other Data Modeling Methods

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

By euclid
(124 views)

Database Design Fundamentals

Database Design Fundamentals

Database Design Fundamentals. Louis Davidson Data Architect, SQL Server MVP, Nerd. Who am I?. Been in IT for over 19 years Microsoft MVP For 10 Years Corporate Data Architect Written five books on database design

By kolina
(82 views)

SQL Unit 17 Normalization

SQL Unit 17 Normalization

SQL Unit 17 Normalization. prepared by Kirk Scott. 1. Normal Forms 2. First Normal Form 3. Second Normal Form 4. Third Normal Form 5. Boyce- Codd Normal Form 6. Fourth Normal Form 7. Fifth Normal Form 8. Domain Key Normal Form 9. Nulls and Integrity. 1. Normal Forms.

By mulan
(190 views)

CHAPTER 4

CHAPTER 4

CHAPTER 4. Data and Knowledge Management. Chapter Outline. 4.1 Managing Data 4.2 The Database Approach 4.3 Database Management Systems 4.4 Data Warehousing 4.5 Data Governance 4.6 Knowledge Management. Learning Objectives.

By luz
(123 views)

Logical Agents

Logical Agents

Logical Agents. (Chapter 7 of Russell & Norvig). Outline. Knowledge bases Logic Propositional (Boolean) Logic Normal forms Inference Rules. Knowledge bases. knowledge base = set of sentences in a formal language Declarative approach to building KB Query approach to extracting knowledge.

By chaman
(151 views)

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