Keyphrases
- query language
- data model
- query engine
- database queries
- query evaluation
- database
- expressive power
- rdf data
- sparql queries
- recursive queries
- object oriented
- relational algebra
- query optimization
- relational database systems
- sql queries
- xml data
- query processing
- relational database management systems
- sql statements
- relational tables
- relational calculus
- database query languages
- regular expressions
- relational databases
- execution plan
- relational data model
- cost model
- aggregate functions
- databases
- transitive closure
- rdf graphs
- query result
- database objects
- database server
- complex objects
- database design
- database language