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The top documents tagged [primary key ssn employees]
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primary key ssn employees
R ELATIONAL M ODEL TO SQL Data Model. 22 C ONCEPTUAL D ESIGN : ER TO R ELATIONAL TO SQL How to represent Entity sets, Relationship sets, Attributes, Key.
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1 The Entity-Relationship Model. 2 Overview of Database Design Conceptual design: (ER Model is used at this stage.) –What are the entities and relationships.
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Book Chapter 3 (part 2 ) From ER to Relational Model.
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ER to Relational Mapping. Logical DB Design: ER to Relational Entity sets to tables. CREATE TABLE Employees (ssn CHAR (11), name CHAR (20), lot INTEGER,
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