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    The Ground Allocation Algorithm in Query of Distributed Relational Database System
    HAO Zhongxiao
    1991, 28(8): 1-6.
    Abstract
    Completeness of Axiom System of Functional Dependencies Under Null Value Circumstances
    HAO Zhongxiao
    1991, 28(8): 7-9.
    Abstract
    A Solution for Solving Minimal Cover of Functional Dependency Set Under Null Value Circumstances
    HAO Zhongxiao
    1991, 28(8): 10-15.
    Abstract
    Research on Relational Schema Decomposition Under Null Value Circumstances
    HAO Zhongxiao, WEI Haidong
    1991, 28(8): 16-23.
    Abstract
    Decompositions for Relational Schema Under Null Value Circumstances Into 3NF With preservation of NFD's and Lossless Joins
    HAO Zhongxiao
    1991, 28(8): 24-30.
    Abstract
    Decompositions for Relational Schema Under Null Value Circumstances Into BCNF With Lossless Joins
    HAO Zhongxiao, WEI Haidong
    1991, 28(8): 31-35.
    Abstract
    Theory Concerning the Classification of Cycle Based on Hypergraph
    HAO Zhongxiao, LIU Guohua, GUO Jingfeng
    1991, 28(8): 36-41,15.
    Abstract
    A Method to Find All Can■ate Keys of Relational Schema Based on Basic Cycle
    HAO Zhongxiao
    1991, 28(8): 42-47.
    Abstract
    Decompositions for Relational Schema Based on Hypergraph Into 2NF
    HAO Zhongxiao
    1991, 28(8): 48-52.
    Abstract
    Decompositions for Relational Schema Based on Hypergraph Into 3 NF With Preservation of FD's
    HAO Zhongxiao
    1991, 28(8): 53-59,47.
    Abstract
    Decompositions for Relational Schema Based on Hypergraph Into BCNF With Lossless Joins
    HAO Zhongxiao, FU Chuang, LIU Guohua
    1991, 28(8): 60-66.
    Abstract
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