Stratified sampling of data in a database system
US7069264B2 · kind B2 · utility
9Cited by
14References
26Claims
0Family size
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Key dates
| Filing date | Apr 1, 2002 |
| Grant date | Jun 27, 2006 |
| Priority date | — |
| Expiry date | Jul 11, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S707/99945
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A stratified sampling mechanism is provided in a database system. The stratified sampling mechanism includes defining a clause in a query that indicates stratified sampling is desired. Data from a source table is stratified into different subgroups based on stratification conditions in the query. Sampling is performed within each subgroup.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.