Keyphrases
- databases
- query processing
- database systems
- data management
- database
- relational database systems
- data model
- data independence
- data retrieval
- xml data
- knowledge discovery
- noisy data
- missing data
- processing queries
- query evaluation
- query optimization
- relational databases
- cost model
- data integration
- information retrieval systems
- neural network
- database query processing
- multidatabase environment
- inconsistent knowledge