Resources Contact Us Home
Method and system for generating a statistical summary of a database using a join synopsis

Image Number 8 for United States Patent #6477534.

A method for generating an approximate answer to a query in a database environment in which the database has a plurality of base relations. A query relating to a database is received, and an approximate answer to the query is generated such that the approximate answer is based on at least one join synopsis formed from the database. The method further includes steps of forming a sample-tuple set for at least one selected base relation of a plurality of base relations of a database such that each sample-tuple set contains at least one sample tuple from a corresponding base relation, and forming a join synopsis set for each selected base relation such that each join synopsis set contains a join synopsis for each sample tuple in a sample-tuple set. A join synopsis of a sample tuple is based on a join of the sample tuple and at least one descendent relation of the sample tuple. All join synopsis sets form a statistical summary of the database and are stored.

  Recently Added Patents
Peptides useful in the treatment and/or care of skin, mucous membranes, scalp and/or hair and their use in cosmetic or pharmaceutical compositions
Printed wiring board with reinforced insulation layer and manufacturing method thereof
Dyes and methods of marking biological material
System and method for calibrating display device using transfer functions
Liquid crystal display and manufacturing method thereof
Sericin cationic nanoparticles for application in products for hair and dyed hair
Vehicle speed verification system and method
  Randomly Featured Patents
Hole-transporting material and its use
Phased array antenna with edge elements and associated methods
Voltage monitoring apparatus including active power source, low consumption power source, and a failure diagnosis section to disconnect active power source as a result of failure
Apparatus and method for phase recovery using independently decodable component codes of channel code in wireless communication system
Wheeled folding table
Connecting an electronic card point to a printed circuit on a metal substrate with a capsule
Device for attaching a slat to the frame of a slatted base
Fork lifts
Method of operating ladle refining furnace
Method and apparatus for manufacturing photonic crystal element