About Selections and Joins in Possibilistic Queries Addressed to Possibilistic Databases.
Patrick BoscLaurence DuvalOlivier PivertPublished in: DEXA (2002)
Keyphrases
- databases
- query evaluation
- database
- possibility theory
- possibilistic logic
- database queries
- relational databases
- expected utility
- relational database systems
- data sources
- data retrieval
- response time
- query language
- web search engines
- join queries
- fuzzy numbers
- query processing
- statistical databases
- user queries
- data management
- database systems
- complex queries
- recursive queries
- join operator
- query plan
- set valued attributes
- efficient processing
- query interface
- sql queries
- indexing techniques
- incomplete information
- query optimization
- logic programming
- data model
- information retrieval