Estimation of unique database values
US8549004B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 2010 |
| Grant date | Oct 1, 2013 |
| Priority date | — |
| Expiry date | Apr 9, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F16/24545
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Estimation of unique values in a database can be performed where a data field having multiple information values is provided in the database. The data field can be partitioned into multiple intervals such that each interval includes a range of information values. An interval specific Bloom filter can be calculated for each of the multiple intervals. A binary Bloom filter value can be calculated for an information value within an interval specific Bloom filter. The binary Bloom filter value can represent whether the information value is unique. A number of unique values in the database can be determined based on calculated binary Bloom filter values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.