Keyphrases
- approximate query answering
- aggregate queries
- selectivity estimation
- query optimization
- multi dimensional
- query processing
- database
- xml data
- similarity measure
- approximate answers
- efficient computation
- user queries
- range queries
- data structure
- response time
- query execution
- complex queries
- database queries
- data cube
- query evaluation
- databases
- data mining
- data sources
- query language
- spatial databases
- query terms
- spatial data
- data analysis
- knowledge discovery
- keywords
- probabilistic databases
- index structure
- information retrieval systems