Nest and Unnest Operators in Nested Relations

Article English OPEN
Georgia Garani;
(2008)
  • Publisher: Ubiquity Press
  • Journal: Data Science Journal (issn: 1683-1470, eissn: 1683-1470)
  • Publisher copyright policies & self-archiving
  • Related identifiers: doi: 10.2481/dsj.7.57
  • Subject: Science (General) | Q1-390 | Nested relation | Non-First Normal Form database | Decomposable nested attribute | Non-First Normal Form database; Nested relation; Decomposable nested attribute

By distinguishing nested attributes as Decomposable and Non-Decomposable, it is proved that for all nested relations, unnesting and then renesting on the same attribute yields the original relation subject only to the elimination of duplicate data. Therefore, the statem... View more
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