Systems and methods for estimating the number of unique attributes in a database
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United States of America Patent
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Sep 23, 2008
Grant Date -
Mar 2, 2006
app pub date -
Aug 27, 2004
filing date -
Aug 27, 2004
priority date (Note) -
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Abstract
Systems and methods for estimating the number of unique attributes in a database are disclosed that can include generating a first estimate of the unique values of an attribute using a data sample; generating a second estimate of the unique values of the attribute in the data sample; forming a weighted first estimate; forming a weighted second estimate; and combining the weighted first and second estimates to form a final estimate.
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