Method and apparatus for producing sequenced queries
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United States of America Patent
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Dec 7, 1999
Grant Date -
N/A
app pub date -
Jul 25, 1997
filing date -
Jul 25, 1997
priority date (Note) -
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Abstract
A method and apparatus converts an original query into a sequenced query that takes into account a range of values of a variable defined by a start and end point in performing the query. The start or end points are calculated if necessary and a query to collect all of the start and end points may be generated, and a query is generated that produces a constant set of start and end points defining consecutive periods, such that all the data in the tables related to the original query is constant over each of these periods. These two queries are merged into the original query to produce a sequenced query capable of execution on various database software and capable of taking into account the range of values of the variable in performing the original query.
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