Some Results on the Containment and Minimization of (in) Equality Queries.
Xubo ZhangZ. Meral ÖzsoyogluPublished in: Inf. Process. Lett. (1994)
Keyphrases
- query evaluation
- query language
- query containment
- tree patterns
- conjunctive queries
- datalog queries
- query processing
- database query languages
- query optimization
- range queries
- set valued attributes
- query formulation
- efficient processing
- probabilistic databases
- complex queries
- user queries
- query answering
- cost model
- answering queries
- query logs
- query rewriting
- transitive closure
- web search engines
- database systems
- database
- containment of conjunctive queries
- expressive power
- databases