The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 02, 1999
Filed:
Dec. 23, 1996
Applicant:
Inventors:
James Michael Plasek, Shoreview, MN (US);
Ralph Edward Sipple, Shoreview, MN (US);
Assignee:
Unisys Corporation, Blue Bell, PA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
707102 ; 707104 ;
Abstract
A system and method for expediting database queries by using random sampling. Data associated with a database attribute is partitioned into multiple data classes using a query language grouping command. Each of the data classes is randomly sampled on an individual basis to obtain a corresponding number of class data samples, each of which are stored in a separate sample database table. Database queries are then applied to each of the class data samples in the sample database table.