1933 search results - page 112 / 387 » Query Containment Using Views |
121
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DEXA
2005
Springer
15 years 8 months ago
2005
Springer
In relational database systems a combination of privileges and views is employed to limit a user’s access and to hide non-public data. The data privacy problem is to decide wheth...
122
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MM
2005
ACM
15 years 8 months ago
2005
ACM
In this paper we unify two supposedly distinct tasks in multimedia retrieval. One task involves answering queries with a few examples. The other involves learning models for seman...
127
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ACTA
2002
15 years 2 months ago
2002
Abstract. In this paper the focus is on object-oriented analysis of information systems. We assume that the communication within an application domain can be described by a logbook...
180
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ICDE
2011
IEEE
14 years 6 months ago
2011
IEEE
— In this paper, we study the problem of efficiently computing multiple aggregation queries over a data stream. In order to share computation, prior proposals have suggested ins...
147
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SIGIR
2004
ACM
15 years 8 months ago
2004
ACM
Document-centric XML collections contain text-rich documents, marked up with XML tags. The tags add lightweight semantics to the text. Querying such collections calls for a hybrid...