Database Decomposition into Fourth Normal Form.

Gösta Grahne, Kari-Jouko Räihä: Database Decomposition into Fourth Normal Form. VLDB 1983: 186-196

@inproceedings{DBLP:conf/vldb/GrahneR83,
  author    = {G{\"o}sta Grahne and
               Kari-Jouko R{\"a}ih{\"a}},
  editor    = {Mario Schkolnick and
               Costantino Thanos},
  title     = {Database Decomposition into Fourth Normal Form},
  booktitle = {9th International Conference on Very Large Data Bases, October
               31 - November 2, 1983, Florence, Italy, Proceedings},
  publisher = {Morgan Kaufmann},
  year      = {1983},
  isbn      = {0-934613-15-X},
  pages     = {186-196},
  ee        = {db/conf/vldb/GrahneR83.html},
  crossref  = {DBLP:conf/vldb/83},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}

Abstract

We present an algorithm that decom- poses a database scheme when the dependency set contains functional and multivalued dependencies. The schemes in the resulting decomposition are in fourth normal form and have a lossless join. Our algorithm does not impose restrictions on the allowed set of dependencies, and it never re- quires the computation of the full closure of the dependency set. Furthermore, the algorithm works in polynomial time for classes of dependencies that properly contain conflict-free dependency sets.

Copyright © 1983 by the VLDB Endowment. Permission to copy without fee all or part of this material is granted provided that the copies are not made or distributed for direct commercial advantage, the VLDB copyright notice and the title of the publication and its date appear, and notice is given that copying is by the permission of the Very Large Data Base Endowment. To copy otherwise, or to republish, requires a fee and/or special permission from the Endowment.

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Contents

References

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