Method for estimating cardinalities for query processing in a relational database management system
US5761653A · kind A · utility
89Cited by
9References
40Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 3, 1996 |
| Grant date | Jun 2, 1998 |
| Priority date | — |
| Expiry date | Apr 3, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S707/99933
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present invention provides a method for estimating cardinalities for query processing in a relational database management system. The present method is suitable for use with a query optimizer for estimating cardinalities for sets of columns or keys resulting from a grouping operation or a duplicate removal operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.