A data aggregation system is described herein for accessing and viewing information about an entity stored in multiple data stores. The data aggregation system identifies an entry in a primary data store that contains information about an entity. The system receives a request to associate an entry in a secondary data store with the identified entry in the primary data store. Then, the system identifies information in the secondary data store that identifies the entry in the secondary data store and associates the identified information with the entry in the primary data store. When a user requests to view the entry in the primary data store, the system retrieves the information about the entry in the primary data store and uses the stored entry identifier to also retrieve the information about the entry from the secondary data store. Thus, the information remains in the data store in which it originated, but the data aggregation system provides a unified view.