CodePudding user response:
Ods: the original layer data, the same from the source system data, easy problems,Dw: after the modeling of warehouse, to store your data shall be carried out in accordance with the theme after cleaning, convenient and unified upper application for data analysis, such as: user theme, trading themes, merchants themes, such as
APP, the application layer, according to business requirements for different modeling, such as product gray released by monitoring traffic analysis; Different business BI report analysis; The effect of operating activities analysis, etc.,