Effectively Mining and Using Coverage and Overlap Statistics for Data Integration

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Effectively Mining and Using Coverage and Overlap Statistics for Data Integration

Source: Microsoft

Date: January 2008

Type: White Paper

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Overview: Recent work in data integration has shown the importance of statistical information about the coverage and overlap of sources for efficient query processing. Despite this recognition there are no effective approaches for learning the needed statistics. The key challenge in learning such statistics is keeping the number of needed statistics low enough to have the storage and learning costs manageable. Naive approaches can become infeasible very quickly. This research paper presents a set of connected techniques that estimate the coverage and overlap statistics while keeping the needed statistics tightly under control.

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