HELP! * BLUE=global GREY=local Global HTML version of Foils prepared July 23,1995

Foil 37 Some basic terminology for relational database model

From Full Relational Database HPDC-4 Presentation HPDC-4 Tutorial/CPS616 Spring95 -- August 1, Pentagon City Virginia. by Gang Cheng Marek Podgorny (Geoffrey Fox) * See also color IMAGE
Data Structure
  • relations (files, tables)
  • tuples (records, rows)
  • attributes (fields, columns)
Relation operators
  • scan (select-project) (a relation, a predicate, and an attribute list)
  • sort (reorder)
  • aggregate operators (SUM,AVG,MAX,MIN,...)
  • insert/delete/update
  • set operators (union, intersection, difference)
  • join, merge and division
embedded operators
  • uniformity of the data and operators
  • source of data-flow execution model
Northeast Parallel Architectures Center, Syracuse University, npac@npac.syr.edu

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