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» Dynamic Sample Selection for Approximate Query Processing
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VLDB
2007
ACM
166views Database» more  VLDB 2007»
16 years 11 hour ago
Supporting Time-Constrained SQL Queries in Oracle
The growing nature of databases, and the flexibility inherent in the SQL query language that allows arbitrarily complex formulations, can result in queries that take inordinate am...
Ying Hu, Seema Sundara, Jagannathan Srinivasan
ICDE
2009
IEEE
156views Database» more  ICDE 2009»
16 years 1 months ago
Distributed Structural Relaxation of XPath Queries
Due to the structural heterogeneity of XML, queries are often interpreted approximately. This is achieved by relaxing the query and ranking the results based on their relevance to ...
Georgia Koloniari, Evaggelia Pitoura
DAGSTUHL
2004
15 years 1 months ago
Personalization of Queries based on User Preferences
Query Personalization is the process of dynamically enhancing a query with related user preferences stored in a user profile with the aim of providing personalized answers. The und...
Georgia Koutrika, Yannis E. Ioannidis
SIGIR
2003
ACM
15 years 5 months ago
Evaluating different methods of estimating retrieval quality for resource selection
In a federated digital library system, it is too expensive to query every accessible library. Resource selection is the task to decide to which libraries a query should be routed....
Henrik Nottelmann, Norbert Fuhr
PODS
2002
ACM
138views Database» more  PODS 2002»
15 years 12 months ago
Fast Algorithms For Hierarchical Range Histogram Construction
Data Warehousing and OLAPapplications typically view data as having multiple logical dimensions e.g., product, location with natural hierarchies de ned on each dimension. OLAP que...
Sudipto Guha, Nick Koudas, Divesh Srivastava