Keyphrases
- query processing
- database
- efficient processing
- query language
- web search engines
- user queries
- query evaluation
- response time
- user defined
- complex queries
- database queries
- data sets
- aggregate queries
- data sources
- range queries
- query logs
- relational database systems
- keywords
- database systems
- query formulation
- metadata
- data mining
- boolean queries
- query types