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Third Normal Form (3NF) - Database Normalization
The higher the normal form, the better organized the data is—at least for the computer. In real databases in which data is frequently modified, the goal is generally to achieve third normal form. This prevents many common errors in data entry and retrieval.
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[DOC File]Normal forms
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The first three stages are described as first normal form (1NF), second normal form (2NF) and third normal form (3NF). From a structural point of view, 2NF is better than 1NF and 3NF is better than 2NF. Denormalization: Produces a lower normal form, which is a 3NF will be converted to a 2NF through denormalization.
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[DOCX File]Third Normal Form
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is a higher version of the Third Normal form. This form deals with certain type of anamoly that is not handled by 3NF. A 3NF table which does not have multiple overlapping candidate keys is …
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[DOC File]Chapter 5
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Another Third normal form example: - Answer. 3.6 Boyce-Codd Normal Form. Boyce-Codd Normal Form (BCNF) is one of the forms of database …
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[DOCX File]1NF, 2NF, 3NF and BCNF in Database Normalization
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Third Normal Form Example. The new tables would be: CustomerNo, CustomerName, CustomerAdd. ClerkNo, ClerkName. All of these fields except the primary key will be removed from the original table. The primary key will be left in the original table to allow linking of data as follows: SalesOrderNo, Date, CustomerNo, ClerkNo
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[DOC File]Normalization
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The Third Normal Form (3NF) A table is in 3NF if. it is in 2NF, and. ... For example, an employee can be both a programmer and an analyst, and there are many employees holding the programmer job. This is an example of what is called a many-to-many relationship between two entities. Here, we say that there is a many-to-many relationship between ...
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[DOC File]1
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5.11 Explain the relationship of first, second, third, Boyce–Codd, fourth, fifth, and domain/key normal forms. Each higher normal form includes the one(s) preceding it. A relation in 3NF is also in 1NF and 2NF. 5.12 Define . second normal form. Give an example of a relation in 1NF but not in 2NF. Transform the relation into relations in 2NF.
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[DOC File]COSC 250 - COMPUTER FOR BUSINESS EXAM #2 10/3/95
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The normal forms are applicable to individual tables; to say that an entire database is in normal form n is to say that all of its tables are in normal form n. Newcomers to database design sometimes suppose that normalization proceeds in an iterative fashion, i.e. a 1NF design is first normalized to 2NF, then to 3NF, and so on.
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[DOC File]Normalization
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A table in third normal form (3NF), for example, is consequently in second normal form (2NF) as well; but the reverse is not necessarily the case. Problems addressed by Normalisation Although the Normal Forms are often defined informally in terms of the characteristics of tables, rigorous definitions of the normal forms are concerned with the ...
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Third normal form example