995 search results - page 4 / 199 » Optimization of Complex Nested Queries in Relational Databas... |
DEXA
2003
Springer
13 years 10 months ago
2003
Springer
Abstract. We developed the Nested Relational Sequence Database System (NRSD System), which is built upon the Nested Relational Sequence Model (NRSM). The NRSM eliminates a substant...
SIGMOD
2008
ACM
14 years 5 months ago
2008
ACM
Today's query processing engines do not take advantage of the multiple occurrences of a relation in a query to improve performance. Instead, each instance is treated as a dis...
DBPL
1999
Springer
13 years 9 months ago
1999
Springer
EDBT
2009
ACM
13 years 10 months ago
2009
ACM
Data provenance is essential in applications such as scientific computing, curated databases, and data warehouses. Several systems have been developed that provide provenance fun...
VLDB
2005
ACM
13 years 10 months ago
2005
ACM
Nested iteration is an important technique for query evaluation. It is the default way of executing nested subqueries in SQL. Although decorrelation often results in cheaper non-n...