3225 search results - page 214 / 645 » Query Optimization by Stored Queries |
224
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GIS
2003
ACM
16 years 5 months ago
2003
ACM
Moving object databases store and process data for objects that change location frequently. Materialized views maintained over time must be updated to reflect changes due to the m...
163
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EDBT
2008
ACM
16 years 4 months ago
2008
ACM
Data stream processing systems have become ubiquitous in academic and commercial sectors, with application areas that include financial services, network traffic analysis, battlef...
162
Voted
CIKM
2009
Springer
15 years 11 months ago
2009
Springer
We study the problem of continuous monitoring of top-k queries over multiple non-synchronized streams. Assuming a sliding window model, this general problem has been a well addres...
138
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VLDB
2001
ACM
15 years 9 months ago
2001
ACM
Estimating the number of distinct values is a wellstudied problem, due to its frequent occurrence in queries and its importance in selecting good query plans. Previous work has sh...
150
Voted
DEXA
2009
Springer
15 years 8 months ago
2009
Springer
Abstract. Sensor database is a type of database management system which offers sensor data and stored data in its data model and query languages. In this system, when a user poses ...