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    PODS
    2005
    ACM
    118views Database» more  PODS 2005»
    On the complexity of division and set joins in the relational algebra
    14 years 4 months ago
    On the complexity of division and set joins in the relational algebra
    Download  alpha.uhasselt.be
    We show that any expression of the relational division operator in the relational algebra with union, difference, projection, selection, constant-tagging, and joins, must produce ...
    Dirk Leinders, Jan Van den Bussche
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    SIGMOD
    2009
    ACM
    220views Database» more  SIGMOD 2009»
    Keyword search in databases: the power of RDBMS
    14 years 4 months ago
    Keyword search in databases: the power of RDBMS
    Download  www.se.cuhk.edu.hk
    Keyword search in relational databases (RDBs) has been extensively studied recently. A keyword search (or a keyword query) in RDBs is specified by a set of keywords to explore the...
    Lu Qin, Jeffrey Xu Yu, Lijun Chang
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