AMBIENTUM BIOETHICA BIOLOGIA CHEMIA DIGITALIA DRAMATICA EDUCATIO ARTIS GYMNAST. ENGINEERING EPHEMERIDES EUROPAEA GEOGRAPHIA GEOLOGIA HISTORIA HISTORIA ARTIUM INFORMATICA IURISPRUDENTIA MATHEMATICA MUSICA NEGOTIA OECONOMICA PHILOLOGIA PHILOSOPHIA PHYSICA POLITICA PSYCHOLOGIA-PAEDAGOGIA SOCIOLOGIA THEOLOGIA CATHOLICA THEOLOGIA CATHOLICA LATIN THEOLOGIA GR.-CATH. VARAD THEOLOGIA ORTHODOXA THEOLOGIA REF. TRANSYLVAN
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The STUDIA UNIVERSITATIS BABEŞ-BOLYAI issue article summary The summary of the selected article appears at the bottom of the page. In order to get back to the contents of the issue this article belongs to you have to access the link from the title. In order to see all the articles of the archive which have as author/co-author one of the authors mentioned below, you have to access the link from the author's name. |
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STUDIA INFORMATICA - Issue no. 1 / 2012 | |||||||
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SPECIAL ATTRIBUTES FOR DATABASE NORMAL FORMS DETERMINATION. Authors: . |
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Abstract: The article deals with the relational schemes defined on the reduced sets of functional dependencies divided into equivalence classes.The concepts of non-essential and recoverable attributes are introduced, and the algorithms for their computing are proposed. Some properties of schemes, based on these attributes, are presented as well.Based on non-essential and recoverable attributes some conditions are introduced to make a relation be in the third or Boyce-Codd normal form.These conditions are just sufficient, because there could be a scheme that is in third or Boyce-Codd normal form but doesn’t satisfy them. In addition, the article suggests a normalization algorithm that takes into account these conditions. Key words and phrases. Database, Logical design, Non-essential attributes, Recoverableattributes, Third normal form, Boyce-Codd normal form. |
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