Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Method and apparatus for optimizing database queries involving aggregation predicates










Image Number 2 for United States Patent #6088524.

A method and apparatus for optimizing a query involving aggregation. Aggregation predicates are represented by a constraint language through which relationships involving aggregation predicates can be shown. As a result, new predicates can be inferred from an initial set of aggregation predicates and optimization techniques which involve inferring new predicates can be applied. It is also shown how to restrict the inferences involving aggregation predicates to only those predicates which will lead to new predicates which are relevant to query optimization. In general, the technique is not limited to query optimization, but may be applied to various applications involving the manipulation of aggregation predicates.








 
 
  Recently Added Patents
Image forming apparatus forming images in response to image formation request from operation unit or external device
Transparent conductive structure
Method for driving bistable display device
Laser protection polymeric materials
Creating and manufacturing documents that initially exceed equipment finishing capacity
Shower bench
Memory device, test operation method thereof, and system including the same
  Randomly Featured Patents
Composition containing proton-conductive copolymer, polymer electrolyte membrane, method of producing the membrane, and fuel cell using the membrane
Method of making replaceable lamp unit for use in automobile headlight
EL display device for reducing pseudo contour
Process for purification of alkyl methacrylates
System for conditioning grain and maintaining same
Temperature transient detection system for superconducting magnets
Adjustable plant container hanger
System and method for playing a music video game with a drum system game controller
Electro-hydraulic power steering apparatus
Data modulation and demodulation method, spectrum management method, apparatus and system