Grouping Queries with SV-Semantics in Preference SQL.
Markus EndresPatrick RoocksManuel HuberWerner KießlingPublished in: MPREF@AAAI (2014)
Keyphrases
- query language
- database query languages
- aggregate functions
- database queries
- relational database systems
- database
- relational calculus
- relational algebra
- relational data model
- recursive queries
- query processing
- query evaluation
- relational databases
- query containment
- expressive power
- relational model
- relational operators
- relational query languages
- database systems
- duplicate elimination
- relational database management systems
- query answers
- databases
- commercial database systems
- response time
- sparql queries
- aggregate queries
- sql queries
- query optimization
- data model
- execution plan
- language constructs
- preference relations
- conjunctive queries
- sql statements
- null values
- query engine
- xml data
- query answering
- database applications
- web search engines
- user queries
- object oriented
- xml query languages
- type checking
- database design
- conceptual model
- formal semantics