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Mediator systems integrate distributed, heterogeneous and autonomous data sources, but their effective use requires the solution of hard query optimization problems. This is usually done in two phases: the selection of a set of data sources is similar to a set covering problem, and their ordering into a feasible and efficient query is a capability restricted join order problem. However, a two-phase...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.