2492 search results - page 231 / 499 » Ontology-based Database Access |
243
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SIGMOD
2008
ACM
16 years 6 months ago
2008
ACM
There has been a significant amount of excitement and recent work on column-oriented database systems ("column-stores"). These database systems have been shown to perfor...
259
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ICDE
2009
IEEE
16 years 8 months ago
2009
IEEE
This paper presents a model and a tool that allows Web users to define, execute, and manage lifecycles for any artifact available on the Web. In the paper we show the need for life...
257
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ICDE
1999
IEEE
16 years 8 months ago
1999
IEEE
Most operations of the relational algebra or SQL require a sorted stream of tuples for efficient processing. Therefore, processing complex relational queries relies on efficient a...
277
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VLDB
2008
ACM
16 years 6 months ago
2008
ACM
Abstract Existing spatiotemporal indexes suffer from either large update cost or poor query performance, except for the Bx -tree (the state-of-the-art), which consists of multiple ...
179
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SIGMOD
2003
ACM
16 years 6 months ago
2003
ACM
One of the critical deficiencies of SQL is lack of support for ndimensional array-based computations which are frequent in OLAP environments. Relational OLAP (ROLAP) applications ...