conjunctive queries.
Foto N. AfratiRada ChirkovaManolis GergatsoulisVassia PavlakiPublished in: Acta Informatica (2007)
Keyphrases
- conjunctive queries
- query answering
- integrity constraints
- query evaluation
- data complexity
- query language
- np complete
- special case
- data exchange
- decision procedures
- query rewriting
- boolean expressions
- query containment
- datalog programs
- probabilistic databases
- conjunctive query containment
- databases
- conp complete
- conjunctive regular path queries
- unions of conjunctive queries
- relational queries
- dl lite
- relational databases