Fact table storage in a decision support system environment
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United States of America Patent
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Jan 20, 2009
Grant Date -
Jan 6, 2005
app pub date -
Nov 20, 2003
filing date -
Jul 3, 2003
priority date (Note) -
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status (Latency Note)
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Abstract
A fact table is set up without any dimension columns. The data in the table is ordered according to an order corresponding to the ordering of the dimensions. The table is divided into segments corresponding to contiguous portions of data. The portions of the table containing non-null values for the measures are placed into the segments. The size of the segments and the location segments may be determined according to the density of discontinuities in the data. An indexed organized table is used to determine the beginning and end of each segment of the table, the locations of the discontinuities in the data, and to facilitate accessing the measures of the table.
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