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Schema Refinement, Normalization, and Tuning

Schema Refinement, Normalization, and Tuning. Design Steps. The design steps: 1. Real-World 2. ER model 3. Relational Schema 4. Better relational Schema 5. Relational DBMS

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653 views • 49 slides

Functional Dependencies And Normalization

Functional Dependencies And Normalization. R&G Chapter 19. Review: Database Design. Requirements Analysis user needs; what must database do? Conceptual Design high level descr (often done w/ER model) Logical Design translate ER into DBMS data model Schema Refinement

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532 views • 43 slides

Schema Refinement and Normalization

Schema Refinement and Normalization. Functional Dependencies (Review). A functional dependency X ? Y holds over relation schema R if, for every allowable instance r of R: t1 ? r, t2 ? r, p X ( t1 ) = p X ( t2 ) implies p Y ( t1 ) = p Y ( t2 )

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466 views • 26 slides

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Schema Refinement, Normalization, and Tuning

Functional Dependencies And Normalization

Schema Refinement and Normalization