Final answer:
Customers need to have limited access to a shared data warehouse.
Step-by-step explanation:
The type of data warehouse that customers need to have limited access to is a shared data warehouse. A shared data warehouse is a central repository of data that is accessible by multiple users or departments within an organization. However, not all users require access to all data within the warehouse. Access to the data should be limited to only the specific information that each user needs to perform their job.
For example, in a retail company, the sales team may need access to customer purchasing data while the finance team may require access to financial data. By providing limited access, organizations can ensure data security, privacy, and compliance with regulations such as the General Data Protection Regulation (GDPR).