Data Integration: Query Expressions
27 setembro 2018, 14:30 • Helena Galhardas
Query reformulation component of a virtual data integration system:
- Query expressions in SQL
- Query expressions in Datalog - conjunctive queries, Datalog rules, disjunction in Datalog, query unfolding
- Mapping the mediated schema in terms of the local schema through query expressions
- Notions of query equivalence and query containment.