995 search results - page 60 / 199 » Optimization of Complex Nested Queries in Relational Databas... |
105
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ICDE
2007
IEEE
15 years 5 months ago
2007
IEEE
In this paper, we propose a simple and flexible execution model that (i) supports a wide spectrum of alternative optimization and execution strategies and their mixtures, (ii) pro...
140
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SIGMOD
2003
ACM
16 years 2 months ago
2003
ACM
The W3C XQuery language recommendation, based on a hierarchical and ordered document model, supports a wide variety of constructs and use cases. There is a diversity of approaches...
141
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ICDT
1997
ACM
15 years 6 months ago
1997
ACM
Abstract. The goal of this paper is to study tractable iteration mechanisms for bags. The presence of duplicates in bags prevents iteration mechanisms developed in the context of s...
118
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VLDB
2004
ACM
15 years 7 months ago
2004
ACM
SQL in the IBM® DB2® Universal Database™ for Linux®, UNIX®, and Windows® (DB2 UDB) database management product has been extended to support nested INSERT, UPDATE, and DELET...
200
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SIGMOD
2006
ACM
16 years 2 months ago
2006
ACM
We present our prototype system, OMCAT, which optimizes the reevaluation of a set of pending continuous spatio-temporal queries on trajectory data, when some of the trajectories a...