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    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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    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: School of Business, Economics & Informatics > Computer Science and Information Systems
    Depositing User: Sarah Hall
    Date Deposited: 15 Jun 2021 17:10
    Last Modified: 15 Jun 2021 17:10
    URI: https://eprints.bbk.ac.uk/id/eprint/44742

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