708 search results - page 18 / 142 » Optimizing SQL Queries over Text Databases |
ICDE
2005
IEEE
14 years 8 months ago
2005
IEEE
23
Voted
ERSHOV
2006
Springer
13 years 11 months ago
2006
Springer
In this work, we present a semantic query optimization technique to improve the efficiency of the evaluation of a subset of SQL:1999 recursive queries. Using datalog notation, we c...
ICDE
2005
IEEE
14 years 8 months ago
2005
IEEE
The SQL queries produced in XML-to-SQL query translation are often unnecessarily complex, even for simple input XML queries. In this paper we argue that relational systems can do ...
CORR
2007
Springer
13 years 7 months ago
2007
Springer
The SkyServer is an Internet portal to the Sloan Digital Sky Survey Catalog Archive Server. From 2001 to 2006, there were a million visitors in 3 million sessions generating 170 mi...
VLDB
2004
ACM
14 years 25 days ago
2004
ACM
PIVOT and UNPIVOT, two operators on tabular data that exchange rows and columns, enable data transformations useful in data modeling, data analysis, and data presentation. They ca...