Keyphrases
- database
- query processing
- pre computed
- highly ranked
- query language
- query evaluation
- approximate answers
- database queries
- query logs
- efficient processing
- boolean queries
- exact and approximate
- response time
- query formulation
- search queries
- aggregate queries
- selectivity estimation
- retrieval systems
- answering queries
- range queries
- data sources
- prior art
- web search engines
- data management