Answering Queries Addressed to Several Databases: A Query Evaluator which Implements a Majority Merging Approach.
Laurence CholvyChristophe GarionPublished in: ISMIS (2002)
Keyphrases
- answering queries
- databases
- query answering
- query processing
- database
- relational queries
- database systems
- logical implication
- data integration
- first order logic
- relational databases
- knowledge discovery
- data sets
- materialized views
- data exchange
- data warehouse
- user queries
- cost model
- information retrieval systems
- data sources
- metadata
- complexity of query answering