Keyphrases
- data sharing
- conjunctive queries
- query answering
- data integration
- encryption scheme
- query evaluation
- integrity constraints
- data access
- data exchange
- data complexity
- np complete
- query language
- query rewriting
- information sharing
- data management
- peer to peer
- probabilistic databases
- databases
- cloud computing
- special case
- schema mappings
- decision procedures
- digital libraries
- decision support
- data model
- query processing
- boolean expressions
- sensitive data
- database systems
- database
- encrypted data
- containment of conjunctive queries
- conjunctive query containment