Keyphrases
- query processing
- query language
- efficient processing
- database
- query evaluation
- response time
- web search engines
- query terms
- user queries
- answering queries
- database queries
- conflict resolution
- data sources
- probabilistic databases
- information retrieval
- pre computed
- query formulation
- search queries
- query logs
- expressive power
- multi dimensional
- data model
- relational databases