6650 search results - page 584 / 1330 » Mutating database queries |
205
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DASFAA
2010
IEEE
16 years 6 days ago
2010
IEEE
Given a set of query points, a dynamic skyline query reports all data points that are not dominated by other data points according to the distances between data points and query po...
184
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VLDB
1998
ACM
15 years 11 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...
185
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VLDB
1998
ACM
15 years 11 months ago
1998
ACM
Query optimizers normally compile queries into one optimal plan by assuming complete knowledge of all cost parameters such asselectivity and resourceavailability. The execution of...
217
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SIGMOD
1997
ACM
15 years 11 months ago
1997
ACM
We study similarity queries for time series data where similarity is defined in terms of a set of linear transformations on the Fourier series representation of a sequence. We ha...
199
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DASFAA
2009
IEEE
15 years 11 months ago
2009
IEEE
Abstract. Query expansion has received extensive attention in information retrieval community. Although semantic based query expansion appears to be promising in improving retrieva...