Keyphrases
- query processing
- response time
- database
- database queries
- error rate
- range queries
- query evaluation
- keywords
- data sources
- data structure
- query execution
- relevance feedback
- query expansion
- complex queries
- answering queries
- user defined
- user interaction
- relational databases
- query formulation
- efficient processing
- retrieval accuracy
- object retrieval
- data sets