Export Citations
Save this search
Please login to be able to save your searches and receive alerts for new content matching your search criteria.
- research-articleAugust 2004
Optimizing Top-k Selection Queries over Multimedia Repositories
IEEE Transactions on Knowledge and Data Engineering (IEEECS_TKDE), Volume 16, Issue 8August 2004, Pages 992–1009https://doi.org/10.1109/TKDE.2004.30Repositories of multimedia objects having multiple types of attributes (e.g., image, text) are becoming increasingly common. A query on these attributes will typically request not just a set of objects, as in the traditional relational query model (...
- ArticleMarch 2004
Selectivity Estimation for String Predicates: Overcoming the Underestimation Problem
ICDE '04: Proceedings of the 20th International Conference on Data EngineeringMarch 2004, Page 227Queries with (equality or LIKE) selection predicatesover string attributes are widely used in relationaldatabases. However, state-of-the-art techniques forestimating selectivities of string predicates are often biasedtowards severely underestimating ...
- articleJune 2002
Top-k selection queries over relational databases: Mapping strategies and performance evaluation
ACM Transactions on Database Systems (TODS), Volume 27, Issue 2Pages 153–187https://doi.org/10.1145/568518.568519In many applications, users specify target values for certain attributes, without requiring exact matches to these values in return. Instead, the result to such queries is typically a rank of the "top k" tuples that best match the given attribute ...
- ArticleMay 2001
STHoles: a multidimensional workload-aware histogram
SIGMOD '01: Proceedings of the 2001 ACM SIGMOD international conference on Management of dataMay 2001, Pages 211–222https://doi.org/10.1145/375663.375686Attributes of a relation are not typically independent. Multidimensional histograms can be an effective tool for accurate multiattribute query selectivity estimation. In this paper, we introduce STHoles, a “workload-aware” histogram that allows bucket ...
Also Published in:
ACM SIGMOD Record: Volume 30 Issue 2, June 2001 - ArticleSeptember 1999
- ArticleJune 1996
Optimizing queries over multimedia repositories
SIGMOD '96: Proceedings of the 1996 ACM SIGMOD international conference on Management of dataJune 1996, Pages 91–102https://doi.org/10.1145/233269.233323Repositories of multimedia objects having multiple types of attributes (e.g., image, text) are becoming increasingly common. A selection on these attributes will typically produce not just a set of objects, as in the traditional relational query model (...
Also Published in:
ACM SIGMOD Record: Volume 25 Issue 2, June 1996