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The Relational Model

The Relational Model

The Relational Model. Chapter 3. Modified by Donghui Zhang. Why Study the Relational Model? . Most widely used model. IBM, Informix, Microsoft, Oracle, Sybase, etc. Older models hierarchical model, network model Recent competitor: object-oriented model ObjectStore, Versant, Ontos

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485 views • 33 slides
The Relational Model

The Relational Model

The Relational Model. Chapter 3. Modified by Donghui Zhang. Why Study the Relational Model? . Most widely used model. IBM, Informix, Microsoft, Oracle, Sybase, etc. Older models hierarchical model, network model Recent competitor: object-oriented model ObjectStore, Versant, Ontos

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604 views • 33 slides
Relational Database

Relational Database

Relational Database. Relational Database. Relational database : a set of relations Relation : made up of 2 parts: Schema : specifies the name of relations, plus name and type of each column.

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411 views • 23 slides
Logical DB Design: ER to Relational

Logical DB Design: ER to Relational

name. ssn. lot. Employees. Logical DB Design: ER to Relational. Entity sets to tables. CREATE TABLE Employees (ssn CHAR (11), name CHAR (20), lot INTEGER , PRIMARY KEY (ssn) ). name. ssn. lot. Employees.

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744 views • 23 slides
ER to Relational Mapping

ER to Relational Mapping

ER to Relational Mapping. name. ssn. lot. Employees. Logical DB Design: ER to Relational. Entity sets to tables. CREATE TABLE Employees (ssn CHAR (11), name CHAR (20), lot INTEGER , PRIMARY KEY (ssn) ).

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276 views • 18 slides
ER to Relational Mapping

ER to Relational Mapping

ER to Relational Mapping. name. ssn. lot. Employees. Logical DB Design: ER to Relational. Entity sets to tables. CREATE TABLE Employees (ssn CHAR (11), name CHAR (20), lot INTEGER , PRIMARY KEY (ssn) ).

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310 views • 12 slides

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