Declarative Rule

• Name: Relational Algebra Projection
• Description in English: This rule represents the relational algebra projection operation. It output a new relation with only the specified columns.
• Example in English: Project("r(x, y, z)", "x, y", "s(x, y)")
• Source(s):
  • Name: A Relational Model of Data for Large Shared Data Banks
  • URL: http://www.acm.org/classics/nov95/
  • Author(s):
    • Name: Edgar F. Codd
    • URL: http://www.acm.org/awards/turing_citations/codd.html
  • Publisher:
    • Name: Association for Computing Machinery
    • URL: http://www.acm.org/
  • Year: 1970

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