2554 search results - page 40 / 511 » Keyword query cleaning |
PODS
2008
ACM
14 years 7 months ago
2008
ACM
We study complexity and approximation of queries in an expressive query language for probabilistic databases. The language studied supports the compositional use of confidence com...
BTW
2003
Springer
14 years 25 days ago
2003
Springer
Abstract: Optimization of nested queries, in particular finding equivalent “flattened” queries for queries that employ the SQL sub-query construct, has been researched extensiv...
WWW
2001
ACM
14 years 8 months ago
2001
ACM
We report results for an independent, blind evaluation of the performance of 11 commercial search engines on 106 online service queries and on 54 topic relevance queries. We found...
IQIS
2005
ACM
14 years 1 months ago
2005
ACM
Researchers in the data mining area frequently have to spend significant portion of their time on preprocessing the data in order to apply their algorithms to real-world datasets...
VLDB
1998
ACM
13 years 11 months ago
1998
ACM
The query execution engine in Microsoft SQL Server employs hash-based algorithms for inner and outer joins, semi-joins, set operations (such as intersection), grouping, and duplic...