Research of granularity based on the design of database warehouse in the supermarket shopping
Zhang Fei-miao · Electronic Design Engineering · 2009
Granularity is the most important problem of the design of database warehouse.The appropriate granularity for the database warehouse not only can supply the best decision information,but also can save storage space,and have more efficiency of access.This paper takes the supermarket shopping for example, studies granularity in the design of database warehouse, according to the total quantity of data and demand of the decision support decides the granularity grade.