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Employee ssn - PowerPoint PPT Presentation

Chapter Outline

Chapter Outline

Chapter Outline. Informal Design Guidelines for Relational Databases Functional Dependencies Normal Forms Based on Primary Keys General Normal Form Definitions (For Multiple Keys) BCNF (Boyce-Codd Normal Form). Informal Design Guidelines for Relational Databases - 1.

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816 views • 47 slides
Mapping from conceptual model (EER-M) into a relational schema

Mapping from conceptual model (EER-M) into a relational schema

Mapping from conceptual model (EER-M) into a relational schema. Lifecycle of Database system development. Mapping an EER-Model into a relational schema. This approach involves applying transformation rules (or steps) to the EER model in order to achieve a relational logical schema.

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774 views • 45 slides
TOPIC 3 (part 2)

TOPIC 3 (part 2)

TOPIC 3 (part 2). Enhanced Entity-Relationship Modeling (EER) & Transformation to Relational Tables. Dr. WENNY RAHAYU. Reading : Chpts 4 and 7, Elmasri & Navathe. EER Model. EER stands for Enhanced ER or Extended ER EER Model Concepts Includes all modeling concepts of basic ER

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455 views • 34 slides
XML and Relational Databases

XML and Relational Databases

Leonidas Fegaras. XML and Relational Databases. Two Approaches. XML Publishing treat existing relational data sets as if they were XML define an XML view of the relational data pose XML queries over this view global as view (GAV) vs local as view (LAV) materializing (parts of) the view

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462 views • 30 slides
Exercise 1 Relational Algebra

Exercise 1 Relational Algebra

Exercise 1 Relational Algebra. 6 Relations of Company. Exercises. (a) Retrieve the names of employees in department 5 who work more than 10 hours per week on the 'ProductX' project. (b) List the names of employees who have a dependent with the same first name as themselves.

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338 views • 13 slides
E-R to Relational - Basic

E-R to Relational - Basic

E-R to Relational - Basic. Strong entity Table with all attributes of that entity Relationships Table with primary keys of participating entities Weak entity Table with primary key of strong entity Multi-valued Attribute X Table with X, primary key of strong entity Row per value of X

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184 views • 4 slides
E-R to Relational - Basic

E-R to Relational - Basic

E-R to Relational - Basic. Strong entity Table with all attributes of that entity Relationships Table with primary keys of participating entities Weak entity Table with primary key of strong entity Multi-valued Attribute X Table with X, primary key of strong entity Row per value of X

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90 views • 4 slides

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