SPARQL Aggregate Queries Made Easy with Diagrammatic Query Language ViziQuer.
Karlis CeransJulija OvcinnikovaMartins ZviedrisPublished in: ISWC (Posters & Demos) (2015)
Keyphrases
- aggregate queries
- query language
- data model
- rdf data
- query processing
- sparql queries
- expressive power
- efficient computation
- data cube
- query evaluation
- probabilistic xml
- aggregate functions
- probabilistic databases
- conjunctive queries
- aggregation functions
- relational algebra
- database
- regular expressions
- transitive closure
- data integration
- approximate answers
- query answers
- recursive queries
- linked data
- xml data
- multi dimensional
- data sources
- data mining