An Ehrenfeucht-Fraïssé Approach to Collapse Results for First-Order Queries over Embedded Databases.
Clemens LautemannNicole SchweikardtPublished in: STACS (2001)
Keyphrases
- databases
- database queries
- database
- data sources
- query language
- query processing
- relational database systems
- data retrieval
- statistical databases
- range queries
- query evaluation
- relational database management systems
- query interface
- indexing techniques
- web search engines
- efficient processing
- data collections
- query logs
- relational databases
- higher order
- user queries
- database views
- aggregate queries
- data management
- embedded systems
- database applications
- retrieval systems
- multi dimensional
- response time
- web databases
- data warehouse
- query formulation
- document collections
- information retrieval
- horn clauses
- query terms
- probabilistic databases
- null values