Keyphrases
- query processing
- result set
- user defined
- efficient processing
- query evaluation
- response time
- query language
- skyline queries
- aggregation queries
- range queries
- query formulation
- web search engines
- database systems
- search queries
- database queries
- query optimization
- index structure
- query result
- aggregate queries
- database
- query logs
- user queries
- language model
- inverted file
- exact and approximate
- approximate answers