189 search results - page 4 / 38 » Translating and Optimizing SQL Queries Having Aggregates |
SIGMOD
2006
ACM
14 years 5 months ago
2006
ACM
Consider an XML view defined over a relational database, and a user query specified over this view. This user XML query is typically processed using the following steps: (a) our t...
SIGMOD
2001
ACM
14 years 5 months ago
2001
ACM
The ability to approximately answer aggregation queries accurately and efficiently is of great benefit for decision support and data mining tools. In contrast to previous sampling...
BNCOD
2007
13 years 7 months ago
2007
Order is essential for XML query processing. Efficient XML processing with order consideration over relational storage is non-trivial, especially for complex nested XQuery expressi...
ICDE
2007
IEEE
14 years 7 months ago
2007
IEEE
Optimizing nested queries is an intricate problem. It becomes even harder if in a nested query the linking predicate or the correlation predicate occurs disjunctively. We present ...
DASFAA
2005
IEEE
13 years 11 months ago
2005
IEEE
: Semi-structured data has become more and more attention-getting with the emergence of XML, and it has aroused much enthusiasm for integrating XML and SQL in database community. D...