Keyphrases
- query optimization
- database systems
- cost model
- query execution
- cost estimation
- multidatabase systems
- query processing
- query optimizer
- database technology
- cardinality estimation
- data management
- database management systems
- query scheduling
- concurrency control
- databases
- database
- recursive queries
- efficient query processing
- data placement
- data model
- approximate query answering
- transaction management
- database applications
- xml data
- object oriented
- object oriented database systems
- continuous queries
- query execution plan
- distributed database systems
- data types
- data warehouse
- query execution plans
- complex queries
- relational database systems