6413 search results - page 965 / 1283 » Classes of cycle bases |
208
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PODS
1999
ACM
15 years 11 months ago
1999
ACM
We investigate the problem of how to extend constraint query languages with aggregate operators. We deal with standard relational aggregation, and also with aggregates speci c to ...
145
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VLDB
1999
ACM
15 years 11 months ago
1999
ACM
This paper aims to improve the accuracy of query result-size estimations in query optimizers by leveraging the dynamic feedback obtained from observations on the executed query wo...
197
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ECOOPW
1998
Springer
15 years 11 months ago
1998
Springer
This paper explains the structure of a project repository, which enables you to trace business processes and business rules to the architecture and design of the software system. T...
185
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STOC
1997
ACM
15 years 11 months ago
1997
ACM
For a large class of examples arising in statistical physics known as attractive spin systems (e.g., the Ising model), one seeks to sample from a probability distribution π on an...
207
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DBPL
1997
Springer
15 years 11 months ago
1997
Springer
Previous research on materialized views has primarily been in the context of flat relational databases--materialized views defined in terms of one or more flat relations. This pape...