Keyphrases
- query processing
- query language
- response time
- web search engines
- query logs
- data sources
- complex queries
- range queries
- efficient processing
- database queries
- query evaluation
- approximate answers
- databases
- aggregate queries
- relational database systems
- search queries
- user defined
- web search
- query interface
- query formulation
- relational databases
- metadata
- boolean queries
- neural network