Keyphrases
- database
- query processing
- query evaluation
- response time
- query formulation
- data structure
- computational complexity
- relevance feedback
- range queries
- user queries
- aggregate queries
- result set
- keyword search
- vector space
- user defined
- retrieval systems
- query expansion
- databases
- test collection
- np hard
- indexing techniques
- relational databases
- query execution
- keywords
- database administrators