3NF


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3NF

3NF

(Third Normal Form) See normalization.
References in periodicals archive ?
3NF : Table(x) [conjunction] Second Normal Form(x) a column(x,col) [conjunction] FD(x,fd) [conjunction] ~ Transitive Dependency (fd) [right arrow] Third Normal Form(x) [No transitive dependencies should be derived]
Section 4 presents an algorithm for classifying dependencies into full and partial and in section 5 we present the algorithms for the decomposition into 2NF and 3NF respectively.
The main task in relational schema normalization is producing such a set of schemas that posses the required form, usually 3NF or BCNF.
Summary of main complexity results Problem/Class FD IP SF MONO Optimum cover NPC P P P Superkey of NPC NPC P P cardinality k Prime attribute NPC P P P 3NF NPC P P P Optimum BCNF NPH -- -- P
Algorithms for synthesis into 3NF include Bernstein (1976) and Biskup et al.
Though the molecules' low reduction potential suggested both should be strongly mutagenic in bacteria (a gauge of potential carcinogenicity), only 3NF was.
Infovisionix' product features Oracle's high performance data base, Oracle's comprehensive 3NF retail data model (ORDM), loading routines and pre-packaged star schema, Infovisionix business semantic model along with retail-specific analytics, role-based dashboards, common decision making workflows and reports tailored for all roles within the retail enterprise.
Rob & Coronel (2007) take the stance that "Almost all business designs use 3NF as the ideal normal form" (p.
The London Archive Users' Forum, 13 Grovewood Sandycombe Rd, Richmond TW9 3NF Tel: 020 8296 8794
A stronger definition of 3NF was proposed by Boyce and Codd [1974], and is known as the Boyce-Codd normal form.
In the decomposition approach, a set of relations that are not in 3NF [13] are decomposed into 3NF relations by using a set of FDs [12, 15].
Anna Barlet, c/o Seymour Pierce, 29/30 Cornhhill, London EC3V 3NF.