Keyphrases
- database
- query processing
- database systems
- databases
- data management
- relational databases
- data model
- relational database systems
- rank aggregation
- data sets
- continuous queries
- database queries
- database management
- efficient query processing
- database management systems
- aggregate queries
- aggregation queries
- database query processing
- query workloads
- query execution
- cost model
- database applications
- xml data
- query language
- website
- information retrieval