From three points for:
1) services offered
2) Business Domain
3) the level of division
1) services offered
a, a data warehouse is essentially serve people. Detailed data, aggregated index, conversion rate model, they are the people of the current user
b, service station data object becomes human + machine. Users tab, machine learning models, data mining models, their goal is the system. For example advertising system, recommended system, risk control system
2) Integration domain data traffic
a, a data warehouse may be only a business, such as business electricity supplier. Although divided pc terminal, mobile terminal, CRM, ERP, but they are all around a business process.
b, data in multiple business units, such as loans + electricity supplier, they two completely different business processes.
It is not just the various data integration system, he needs to get through all business processes data. For example, open up user data, make various contacts of the data collected, including electricity and lenders.
3) the level of division
a, a data warehouse may be the subject of division
b, the data in the table before the theme division, there will be a division of the business domain