2853 search results - page 158 / 571 » On the Efficiency of Provenance Queries |
246
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SIGMOD
2007
ACM
16 years 6 months ago
2007
ACM
The Boolean semantics of SQL queries cannot adequately capture the "fuzzy" preferences and "soft" criteria required in non-traditional data retrieval applicati...
194
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SIGMOD
2004
ACM
16 years 6 months ago
2004
ACM
The prevalent use of XML highlights the need for a generic, flexible access-control mechanism for XML documents that supports efficient and secure query access, without revealing ...
261
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ICDE
2003
IEEE
16 years 7 months ago
2003
IEEE
In order to publish a nested XML document from flat relational data, multiple SQL queries are often needed. The efficiency of publishing relies on how fast these queries can be ev...
185
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DEBU
2010
15 years 6 months ago
2010
Consider a universe of tokens, each of which is associated with a weight, and a database consisting of strings that can be represented as subsets of these tokens. Given a query st...
184
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IDEAS
2009
IEEE
15 years 4 months ago
2009
IEEE
We consider the class of database programs and address the problem of minimizing the cost of their exchanges with the database server. This cost partly consists of query execution...