9683 search results - page 428 / 1937 » Predicting query performance |
178
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VLDB
2000
ACM
15 years 10 months ago
2000
ACM
When a data warehouse is loaded at night and queried during the day, there is no requirement for concurrent update and querying. However there are a number of situations where con...
191
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VLDB
1995
ACM
15 years 10 months ago
1995
ACM
Efficient processing of aggregation queries is essential for decision support applications. This paper describes a class of query transformations, called eager aggregation and lat...
174
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VLDB
2002
ACM
15 years 6 months ago
2002
ACM
Data warehouses offer a compromise between freshness of data and query evaluation times. However, a fixed preference ratio between these two variables is too undifferentiated. Wit...
197
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SIGIR
2008
ACM
15 years 5 months ago
2008
ACM
Results caching is an efficient technique for reducing the query processing load, hence it is commonly used in real search engines. This technique, however, bounds the maximum hit...
258
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ICDE
2011
IEEE
14 years 10 months ago
2011
IEEE
— In this paper, we study the problem of efficiently computing multiple aggregation queries over a data stream. In order to share computation, prior proposals have suggested ins...