A GROUP-SELECT OPERATION FOR RELATIONAL ALGEBRA AND IMPLICATIONS FOR DATABASE MACHINE DESIGN

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dc.contributor.authorBradley, Jameseng
dc.date.accessioned2008-02-27T22:58:23Z
dc.date.available2008-02-27T22:58:23Z
dc.date.computerscience1999-05-27eng
dc.date.issued1985-06-01eng
dc.description.abstractA group select operation has been defined for relational algebra. This operation is found to be useful for very efficiently reducing expressions of non procedural relational languages that permit natural quantifiers. Conceptually, the operation first partitions a relation into blocks of tuples that have the same value for an attribute or attribute concatenation. It then extracts each block for which a specified number of tuples meet a specified condition. The quantity of tuples for the operation is specified by means of a natural quantifier. Performance of the group-select operation will be poor with conventional file processing, making the operation more suitable for use with data base machine with an associative memory.eng
dc.description.notesWe are currently acquiring citations for the work deposited into this collection. We recognize the distribution rights of this item may have been assigned to another entity, other than the author(s) of the work.If you can provide the citation for this work or you think you own the distribution rights to this work please contact the Institutional Repository Administrator at digitize@ucalgary.caeng
dc.identifier.department1985-206-19eng
dc.identifier.doihttp://dx.doi.org/10.11575/PRISM/30413
dc.identifier.urihttp://hdl.handle.net/1880/46284
dc.language.isoEngeng
dc.publisher.corporateUniversity of Calgaryeng
dc.publisher.facultyScienceeng
dc.subjectComputer Scienceeng
dc.titleA GROUP-SELECT OPERATION FOR RELATIONAL ALGEBRA AND IMPLICATIONS FOR DATABASE MACHINE DESIGNeng
dc.typeunknown
thesis.degree.disciplineComputer Scienceeng
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