Stratified sampling of data in a database system

Details Stratified sampling of data in a database system Stratified sampling of data in a database system

2006-06-27

2006-06-27

Coby, Frantz (Department: 2161)

Data processing: database and file management or data structures

Database design

Data structure types

C707S793000, C707S793000, C707S793000, C707S793000, C707S793000, C707S793000

Reexamination Certificate

active

07069264

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.

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