654 search results - page 53 / 131 » Complexity of Answering Queries Using Materialized Views |
92
Voted
OTM
2005
Springer
15 years 8 months ago
2005
Springer
Abstract. Caching can highly improve performance of query processing in distributed databases. In this paper we show how this technique can be used in grid architecture where data ...
145
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VLDB
2004
ACM
15 years 8 months ago
2004
ACM
In data stream applications, data arrive continuously and can only be scanned once as the query processor has very limited memory (relative to the size of the stream) to work with...
134
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IDEAS
1999
IEEE
15 years 7 months ago
1999
IEEE
Data-warehousing applications cope with enormous data sets in the range of Gigabytes and Terabytes. Queries usually either select a very small set of this data or perform aggregat...
244
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ICDE
2002
IEEE
16 years 4 months ago
2002
IEEE
XML and other semi-structured data may have partially specified or missing schema information, motivating the use of a structural summary which can be automatically computed from ...
154
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SIGMOD
2004
ACM
16 years 3 months ago
2004
ACM
We study the problem of answering queries through a target schema, given a set of mappings between one or more source schemas and this target schema, and given that the data is at...