The Semantics of Aggregate Queries in Data Exchange Revisited.
Phokion G. KolaitisFrancesca SpezzanoPublished in: SUM (2013)
Keyphrases
- data sets
- data exchange
- aggregate queries
- schema mappings
- query answering
- aggregate functions
- query answers
- data integration
- open world
- data cube
- query processing
- data management
- aggregation functions
- efficient computation
- closed world
- consistent answers
- xml schema
- conjunctive queries
- probabilistic databases
- xml queries
- data warehouse
- data sources
- query containment
- database
- data model
- machine learning
- conceptual model
- computational efficiency
- logic programming
- inconsistent databases