100+ Atomic attributes PowerPoint (PPT) Presentations, Atomic attributes PPTs

Atomic attributes - PowerPoint PPT Presentation

Normalization

Normalization. What is normalization ?. Proposed by Codd in 1972 Takes a relation through a series of steps to certify whether it satisfies a certain normal form Initially Codd proposed three normal forms Boyce- Codd normal form is introduced by Boyce and Codd

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505 views • 37 slides

Normalization Concepts

Normalization Concepts. CIS 507 Database Programming. Introduction. Two types of Anomalies associated with databases. Modification Anomaly an unexpected consequence of changing the actual data in a database Design Anomaly a flaw in the logical design of the database itself

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716 views • 29 slides

Relation Normalization (Chapter 14)

Relation Normalization (Chapter 14). Modification Anomalies. What are modification anomalies? Errors or inconsistencies that may result when a user attempts to update a relation. Types of anomalies. Insertion anomalies.

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316 views • 14 slides

Data Transformation

Data Transformation. Parsing: Splitting fields into atomic attributes. =SUBSTR ( string, position<, length> ). Use this when you have a known position for characters. String: character expression Position: start position (starts with 1)

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321 views • 6 slides

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'Atomic attributes' diaporamas de présentation

Atomic attributes - PowerPoint PPT Presentation

Normalization

Normalization Concepts

Relation Normalization (Chapter 14)

Data Transformation