'3rd normal form' presentation slideshows

Information Resources Management

Information Resources Management. March 13, 2001. Agenda. Administrivia Normalization Homework #7 Mid-Term #2. Administrivia. Homework #4 Homework #5 Homework #6 Quiz 2 Mid-Term #1 Keys Mid-Term Grades. Regrade Requests HW 5 & 6. Create Database Enter query(s) as submitted

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Lecture 13: Relational Decomposition and Relational Algebra

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Normalization

Normalization. A technique for identifying table structures that have potential maintenance problems. Normalization. Normalization is a set of formal conditions that assure that a database is maintainable.

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Normalization

Normalization. Anomalies Boyce-Codd Normal Form 3 rd Normal Form. Anomalies. Goal of relational schema design is to avoid anomalies and redundancy. Update anomaly : one occurrence of a fact is changed, but not all occurrences. Deletion anomaly : valid fact is lost when a tuple is deleted.

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Normalization

Normalization. Anomalies Boyce-Codd Normal Form 3 rd Normal Form. Source: Slides by Jeffrey Ullman. Anomalies. Goal of relational schema design is to avoid anomalies and redundancy. Update anomaly : one occurrence of a fact is changed, but not all occurrences.

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Normalization

340 views • 19 slides

Normalization

Normalization. By Albert Lin. Basics. Process of efficiently organizing data in a database. Goals Eliminate redundant data Ensure data dependency sensibility. Benefits. Faster sorting and index creation Larger clustered indexes Narrow and compact indexes Fewer indexes per table.

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