995 search results - page 14 / 199 » Optimization of Complex Nested Queries in Relational Databas... |
140
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SIGMOD
2000
ACM
15 years 6 months ago
2000
ACM
We investigate the problem of using materialized views to answer SQL queries. We focus on modern decision-support queries, which involve joins, arithmetic operations and other (po...
201
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SIGMOD
2007
ACM
16 years 1 months ago
2007
ACM
Complex queries often contain common or similar subexpressions, either within a single query or among multiple queries submitted as a batch. If so, query execution time can be imp...
118
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ER
2007
Springer
15 years 5 months ago
2007
Springer
The paper presents an unified Description Logic (DL) model for databases. Describing database models using DLs is a fundamental problem in many areas because it turns databases to...
110
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DEXA
2003
Springer
15 years 7 months ago
2003
Springer
Query optimizers in current database management systems (DBMS) often face problems such as intolerably long optimization time and/or poor optimization results when optimizing compl...
229
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ICDE
2006
IEEE
16 years 3 months ago
2006
IEEE
In this paper, we present the ArchIS system that achieves full-functionality transaction-time databases without requiring temporal extensions in XML or database standards. ArchIS&...