You are the database analyst on the team building a data war

You are the database analyst on the team building a data warehouse for an online payment company.

List five possible data sources from which you will bring the data into your data warehouse. State your assumptions.

Bank details about the customer is connected to the customer.

All the available banks in the country.

Mobile number details of the customer .

Address verification so that avoid criminal behavior.

So that the online payment data warehouse would be complete to fetch enough information all the above database is required.