492 search results - page 2 / 99 » Computing aggregations in database query languages |
104
Voted
TCS
1998
15 years 17 hour ago
1998
We introduce a new constraint domain, aggregation constraints, that is useful in database query languages, and in constraint logic programming languages that incorporate aggregate...
122
Voted
SIGMOD
2003
ACM
16 years 15 days ago
2003
ACM
Database queries often take the form of correlated SQL queries. Correlation refers to the use of values from the outer query block to compute the inner subquery. This is a conveni...
109
Voted
PODS
1999
ACM
15 years 4 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 ...
107
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CIKM
2008
Springer
15 years 2 months ago
2008
Springer
Answering queries over ontologies is an important issue for the Semantic Web. Aggregate queries were widely studied for relational databases but almost no results are known for ag...
131
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CORR
2011
Springer
14 years 7 months ago
2011
Springer
We study in this paper provenance information for queries with aggregation. Provenance information was studied in the context of various query languages that do not allow for aggr...