Apparatus and method for estimating cardinality when data...

Details Apparatus and method for estimating cardinality when data... Apparatus and method for estimating cardinality when data...

2007-04-10

2007-04-10

Wong, Don (Department: 2163)

Data processing: database and file management or data structures

Database design

Data structure types

C707S793000

Reexamination Certificate

active

10733959

ABSTRACT:
A cardinality estimator computes an estimated cardinality for a database column using a formula that accounts for skew in the data in the column. The result is an estimate of cardinality that more closely resembles the actual cardinality in the column. The improved cardinality estimate may then be used to make better query optimizations.

REFERENCES:
patent: 6732085 (2004-05-01), Mozes
patent: 2002/0198867 (2002-12-01), Lohman et al.
patent: 2004/0059743 (2004-03-01), Burger

Affiliated with

Also associated with

Rating

Apparatus and method for estimating cardinality when data... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus and method for estimating cardinality when data..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for estimating cardinality when data... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3806092