A Note on Computing Certain Answers to Queries over Incomplete Databases.
Marcelo ArenasElena BotoevaEgor V. KostylevVladislav RyzhikovPublished in: AMW (2017)
Keyphrases
- databases
- complexity of query answering
- database
- database queries
- query answers
- null values
- query answering
- answering queries
- data sources
- query language
- query processing
- query evaluation
- correct answers
- relational database systems
- relational databases
- frequently asked
- data retrieval
- data exchange
- web databases
- query interface
- efficient processing
- data complexity
- structured queries
- statistical databases
- response time
- data model
- query logs
- range queries
- integrity constraints
- web snippets
- deep web
- data warehouse
- indexing techniques
- queries using views
- approximate matches
- natural language questions
- consistent answers
- complex queries
- database objects
- multi dimensional
- question answering systems
- data management
- knowledge discovery
- approximate answers
- data integration
- tree patterns
- web search engines
- query terms
- web pages
- sql queries