Correction to null values in nested relational databases by M.A. Roth, H.F. Korth, and A. Silberschatz

Levene, Mark and Loizou, G. (1991) Correction to null values in nested relational databases by M.A. Roth, H.F. Korth, and A. Silberschatz. Acta Informatica 28 (6), pp. 603-605. ISSN 0001-5903.

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Official URL: https://doi.org/10.1007/BF01463948

Abstract

We show that the extended projection of a nested relation in Partitioned Normal Form (PNF) is not a precise generalization of standard projection with respect to unnesting and PNF possibility functionPOSS.

Metadata

Item Type:	Article
School:	Birkbeck Faculties and Schools > Faculty of Science > School of Computing and Mathematical Sciences
Depositing User:	Sarah Hall
Date Deposited:	15 Jun 2021 17:10
Last Modified:	09 Aug 2023 12:51
URI:	https://eprints.bbk.ac.uk/id/eprint/44742

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