100+ Data model mapping dbms PowerPoint (PPT) Presentations, Data model mapping dbms PPTs

Data model mapping dbms - PowerPoint PPT Presentation

miniworld

miniworld. Requirements & collection analysis. refinement. Database Requirements. Conceptual Design. Conceptual Schema ( ER diagram ). DBMS independent. Data Model Mapping. DBMS specific. Conceptual Schema ( Relations ). primary key constraint foreign key constraint.

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460 views • 22 slides

THIRD NORMAL FORM (3NF)

THIRD NORMAL FORM (3NF). A relation R is in BCNF if whenever a FD X ?A holds in R, one of the following statements is true: X?A is a trivial FD, or X is a superkey, or A is part of some key. Why 3NF? .

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465 views • 14 slides

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Data model mapping dbms - PowerPoint PPT Presentation

miniworld

THIRD NORMAL FORM (3NF)