Keyphrases
- database systems
- query processing
- database
- query execution
- response time
- user queries
- web databases
- query expansion
- relevance feedback
- complex queries
- database queries
- database management systems
- query terms
- access paths
- cost model
- range queries
- databases
- data structure
- data model
- data sources
- boolean queries
- query optimizer
- aggregate queries
- transaction management
- query formulation
- retrieval systems
- retrieval method
- data management
- relational database systems
- index structure
- search queries
- query evaluation
- database applications