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Secondary key all the rest of candidate keys ... http://www.almaden.ibm.com/cs/people/fagin/tods77.pdf. http://www.bkent.net/Doc/simple5.htm ...
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Caterpillar Cat EL300 EXCAVATOR (Prefix 4NF) Service Repair Manual Instant Download
... their Y-components may be swapped, and the result will be ... If X - Y, then swapping Y 's between two tuples that agree on X doesn't change the tuples. ...
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Caterpillar Cat EL300 EXCAVATOR (Prefix 4NF) Service Repair Manual Instant Download
Caterpillar Cat EL300 EXCAVATOR (Prefix 4NF) Service Repair Manual Instant Download
Section Emp='e1' Project='j1'/ /Dept Dept Section Emp='e3' Project='j2'/ /Dept ... Emp. v8 'e3' A. Project 'j2' v10. Basic Definitions ...
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... R is in 4NF if: whenever X - - Y is a nontrivial MVD, then X is a superkey. Nontrivial MVD means that: Y is not a subset of X, and ...
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Database Systems: Design, Implementation, and Management, Fifth Edition, Rob and Coronel ... About the normal forms 1NF, 2NF, 3NF, BCNF, and 4NF ...
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Third Normal Form (3NF) Boyce-Codd Normal Form (BCNF) Fourth Normal Form (4NF) ... Third normal form ... Third Normal Form & BCNF ...
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Anomalies related to Concurrent Execution of Transactions. 2-Phase Locking. ... Closure algorithm. BCNF and 4NF. OLAP. Help page. One help page is allowed in the exam. ...
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Best Database Design-An Information theoretic approach. Caroline ... If a schema(s) holds set of FD's and MVD's (S), it is well-designed if (s, S) is in 4NF. ...
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Fourth normal form has to do with so-called multi-valued dependencies. When faced with a table that is in 1NF, 2NF and 3NF, but not in 4NF, the ...
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A drinker's phones are independent of the beers they like. ... A drinker can have several phones, with the number divided between areaCode and ...
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A multivalued dependency (MVD) on R, X - - Y , says that if ... If A- - B and B- - C, then A- - C. Obvious from the complementation rule if the Schema is ABC. ...
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Definition: ... on any relation state r of R: If two tuples t1 and t2 exist in r such that ... 1. Set D := { R }; 2. While there is a relation schema Q in D ...
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Multivalued Dependency Prof. Sin-Min Lee Department of Computer Science Multivalued Dependencies The multivalued dependency X Y holds in a relation R if whenever we ...
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Functional dependency (FD); Un/Satisfaction of FD by a relation; Properties of FDs; entailment of a FD by a set of FDs; equivalence between two sets of FDs; ...
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Database Systems: Design, Implementation, & Management, 5th Edition, Rob & Coronel ... If employee deleted, other vital data lost ...
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CS 728 Advanced Database Systems Chapter 15 Database Design Theory: Normalization Algorithms Chapter Outline 0. Designing a Set of Relations 1. Properties of ...
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... applies to tables that have composite primary keys, where two or more ... In order to find if a table is in 2NF, ask whether any of the non-key attributes ...
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John enjoys Music. Jogging. Mary enjoys Reading. Tennis. Cycling. Jenny enjoys Music. STUDENT ... customer-name customer-street customer-city ...
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... Transitive Dependence Modification Anomalies What happens when you want to add a new book ... we lost BC D So ... Symbol Monotype Sorts ...
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Title: PowerPoint Author: neoneo Last modified by: a Created Date: 12/12/2002 2:45:49 PM Document presentation format:
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Sleepy, Snoopy, Grumpy. 321-321-1111, 232-234-1234, 665-235-6532. Small House. 714-000-0000 ... Snoopy. 232-234-1234. 0-321-32132-1. Sleepy. 321-321-1111 ...
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Database Systems: Design, Implementation, and Management Tenth Edition Chapter 6 Normalization of Database Tables ...
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Title: Chapter 5 Created Date: 9/27/2002 11:29:22 PM Document presentation format: On-screen Show (4:3) Other titles: Arial Times New Roman Wingdings 1_Default Design ...
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Chapter 3.6-7 Normalization of Database Tables
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Database Systems: Design, Implementation, and Management Tenth Edition Chapter 6 Normalization of Database Tables ...
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Final Exam Coverage SQL. Joins and outerjoins Subqueries Aggregations Views Inserts, updates, deletes Ordering results Constraints FK CHECK Constraints enforced by ...
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A drinker's phones are independent of the beers they like. ... A drinker can have several phones, with the number divided between areaCode and ...
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Chapter 5 Normalization of Database Tables Database Systems: Design, Implementation, and Management 4th Edition Peter Rob & Carlos Coronel Database Tables and ...
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Title: Normalization of Database Tables Author: Chang E.Koh Last modified by: Course Technology Created Date: 9/9/1999 7:56:21 PM Document presentation format
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The FDs of these relations are B CD (and its derived FDs: B C, B D) and A B, respectively. These imply that the newly defined relations only have trivial MVDs or ...
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in (408) 555-9999 and (812)-555-1111, you can't swap area codes ... Consider phone has been split into area code and number and adding manf giving ...
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... normalization from E-R diagramming Business rules must be determined Initial ERD for Contracting Company Modified ERD for Contracting Company Final ERD for ...
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Title: Author: Bogdan Shishedjiev Last modified by: Bogdan Shishedjiev Created Date
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Example: A = street address, B = city, C = zip code. There are two keys, {A,B } and {A,C } ... But we cannot swap area codes or phones by themselves. ...
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Define first normal form, second normal form, and third normal form ... Removal of repeating groups is starting point in quest for problem-free tables ...
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NORMALISASI DATA Basis Data Normalisasi Kedua TABEL PROYEK TABEL PEGAWAI 900.000 Untuk membuat hubungan antara dua tabel, dibuat suatu tabel yang berisi key-key dari ...
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BCNF - A relation is in BCNF if and only if every determinant is a candidate key. ... more) composite candidate keys; the candidate keys overlap (ie. have at ...
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What normalization is and what role it plays in the database design process ... Name the table to reflect its contents and function ...
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We discuss four normal forms based on functional dependencies: ... Normalization is a process that 'improves' a database design by generating ... A B and B C. ...
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Normalization of Database Tables Database Systems: Design, Implementation, and Management, Fifth Edition, Rob and Coronel In this chapter, you will learn: What ...
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Chapter 2 Interconnect Analysis Delay Modeling Prof. Lei He Electrical Engineering Department University of California, Los Angeles URL: eda.ee.ucla.edu
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If A and B are attributes of relation R, B is functionally dependent on A ... Formal technique for analyzing a relation based on its primary key and ...
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Alternatively, we must repeat the address for each movie a star has made ... Star Wars. 1977. Empire Strikes Back. 1980. Return of the Jedi. 1983 ...
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Normalization is a process for assigning ... The Decomposition of a Table Structure. to Meet BCNF Requirements ... Decomposition into BCNF. BCNF Definition ...
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... (single) primary job classification. This job classification determines the hourly billing rate. Many employees can have the same job classification.
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Object-Based Databases Jose Reyes Jose Overview Object-relational data model extends the relational data model by providing a richer type system including complex ...
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Title: PowerPoint Presentation Last modified by: H.C.Gao Created Date: 1/1/1601 12:00:00 AM Document presentation format: (4:3) Other titles
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Title: Chapter 7: Relational Database Design Author: Marilyn Turnamian Last modified by: owner Created Date: 2/23/2000 6:58:38 PM Document presentation format
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Normalizaci n Francisco Moreno * Curso Bases de Datos *
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Table Normalization. Making Sense of Your Data In Five Easy ... Well, Five Steps (Just Kidding) ... Only related data entities may be included in a single table ...
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Formally, R is in BCNF if for every nontrivial FD for R, say X A, then X is a superkey. 'Nontrivial' = right-side attribute not in left side. Why? ...
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The instruments traded (e.g., bonds, stocks, futures, etc. ... Redundancy -- info about trader 1111 trading Government Bonds is recorded three times ...
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Normalization of Database Tables
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