Efficient Algorithms for Approximating Answers to Queries Against Incomplete Relational Databases.
Hans-Joachim KleinPublished in: KRDB (1999)
Keyphrases
- relational databases
- null values
- query answers
- database
- query processing
- databases
- query evaluation
- query language
- keyword queries
- keyword search
- correct answers
- efficient processing
- web snippets
- functional dependencies
- frequently asked
- search queries
- normal form
- integrity constraints
- xml data
- relational database systems
- response time
- relational database management systems
- relational data
- web search engines
- aggregate queries
- xml documents
- object oriented
- natural language questions
- relational tables
- approximate answers
- question answering systems
- data dependencies
- structured queries
- missing data
- user queries
- sql queries
- relational algebra
- relational model
- range queries
- probabilistic databases
- complex queries
- database queries