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View selection for real conjunctive queries
(2007)
Given a query workload, a database and a set of constraints, the view-selection
problem is to select views to materialize so that the constraints are satisfied and the views
can be used to compute the queries in the workload ...
Query containment under bag and bag-set semantics
(2010)
Conjunctive queries (CQs) are at the core of query languages encountered in many logic-based research fields such as AI, or database systems. The majority of existing work assumes set semantics but often in real applications ...