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Grouping and duplicate removal method in a database

  • US 6,381,601 B1
  • Filed: 12/22/1999
  • Issued: 04/30/2002
  • Est. Priority Date: 12/22/1998
  • Status: Expired due to Fees
First Claim
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1. A grouping method comprising the steps of:

  • determining whether there is possibility or not for existence of at least another record having the identical value of a column for grouping of the relevant record for each record by executing a predetermined first process to a value of at least a part of one or more predetermined columns for the grouping of each record of a plurality of records of a record list included in the database;

    determining respectively a part of a plurality of records which is determined, by said determination, not to have possibility for existence of other records having a value of the same grouping column as a records belonging to one group; and

    classifying, by a second process, a plurality of the other records other than a part of said records among a plurality of records of said record list into a plurality of groups so that a plurality of records having the identical value of said columns for grouping belong to the same group.

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