6650 search results - page 315 / 1330 » Mutating database queries |
155
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CDB
2004
Springer
15 years 10 months ago
2004
Springer
Preference queries are relational algebra or SQL queries that contain occurrences of the winnow operator (find the most preferred tuples in a given relation). We present here a nu...
183
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DEXAW
1999
IEEE
1999
IEEE
Using the Distance Distribution for Approximate Similarity Queries in High-Dimensional Metric Spaces
15 years 9 months ago
We investigate the problem of approximate similarity (nearest neighbor) search in high-dimensional metric spaces, and describe how the distance distribution of the query object ca...
123
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SSDBM
1998
IEEE
15 years 9 months ago
1998
IEEE
A relation is an unordered collection of records. Often, however, there is an underlying order (e.g., a sequence of stock prices), and users want to pose queries that reflect this...
125
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PODS
1993
ACM
15 years 9 months ago
1993
ACM
In this paper, we motivate four di erent user de ned window query classes and derive a probabilistic model for each of them. For each model, we characterize the e ciency of spatia...
140
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FQAS
2006
Springer
15 years 8 months ago
2006
Springer
We consider the problem of optimizing processing of batches of frequent itemset queries. The problem is a particular case of multiple-query optimization, where the goal is to minim...