4051 search results - page 251 / 811 » Aggregation |
134
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VLDB
1998
ACM
15 years 8 months ago
1998
ACM
Many applications compute aggregate functions over an attribute (or set of attributes) to find aggregate values above some specified threshold. We call such queries iceberg querie...
151
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CIKM
2006
Springer
15 years 7 months ago
2006
Springer
By providing an integrated and optimized support for user-defined aggregates (UDAs), data stream management systems (DSMS) can achieve superior power and generality while preservi...
111
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ECOOP
2006
Springer
15 years 7 months ago
2006
Springer
Object-oriented programs often require large heaps to run properly or meet performance goals. They use high-overhead collections, bulky data models, and large caches. Discovering t...
129
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EDBT
2000
ACM
15 years 7 months ago
2000
ACM
OLAP applications use precomputation of aggregate data to improve query response time. While this problem has been well-studied in the recent database literature, to our knowledge ...
129
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DOLAP
2005
ACM
15 years 6 months ago
2005
ACM
Data warehouses and OLAP systems help to interactively analyze huge volume of data. This data, extracted from transactional databases, frequently contains spatial information whic...