2070 search results - page 233 / 414 » Querying Communities in Relational Databases |
201
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ER
2008
Springer
15 years 8 months ago
2008
Springer
Access limitations may occur when querying data sources over the web or heterogeneous data sources presented as relational tables: this happens, for instance, in Data Exchange and ...
185
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PVLDB
2010
15 years 4 months ago
2010
Optimization of join queries based on average selectivities is suboptimal in highly correlated databases. In such databases, relations are naturally divided into partitions, each ...
160
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ICDT
2007
ACM
16 years 20 days ago
2007
ACM
Abstract. In many cases, users may want to consider incomplete answers to their queries. Often, however, there is an overwhelming number of such answers, even if subsumed answers a...
201
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DBPL
2001
Springer
15 years 11 months ago
2001
Springer
Abstract. We are interested in the theoretical foundations of the optimization of conjunctive regular path queries (CRPQs). The basic problem here is deciding query containment bot...
184
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SSDBM
1999
IEEE
15 years 10 months ago
1999
IEEE
Conducting bioinformatic analyses involves biologists in expressing requests over a range of highly heterogeneous information sources and software tools. Such activities are labor...