305 search results - page 29 / 61 » Including Group-By in Query Optimization |
ICDE
2009
IEEE
14 years 9 months ago
2009
IEEE
Keyword queries enjoy widespread usage as they represent an intuitive way of specifying information needs. Recently, answering keyword queries on graph-structured data has emerged ...
ICDE
1998
IEEE
14 years 9 months ago
1998
IEEE
The association of timestamps with various data items such as tuples or attribute values is fundamental to the management of time-varying information. Using intervals in timestamp...
ICDE
2005
IEEE
14 years 9 months ago
2005
IEEE
Data warehousing and on-line analytical processing (OLAP) are essential for decision support applications. Common OLAP operations include for example drill down, roll up, pivot an...
ECIR
2010
Springer
13 years 9 months ago
2010
Springer
This paper evaluates the potential impact of explicit phrases on retrieval quality through a case study with the TREC Terabyte benchmark. It compares the performance of user- and s...
ICDE
2008
IEEE
14 years 9 months ago
2008
IEEE
Given a record set D and a query score function F, a top-k query returns k records from D, whose values of function F on their attributes are the highest. In this paper, we investi...