For Trillium DQ to connect to an external data source, the repository administrator must set up at least one loader connection for each type of database you will profile. Trillium DQ can import or link to both flat file data sources and relational databases.
When you create an entity, you are storing a reference to the associated loader connection data. The reference information is useful when you move the data on disks; you update the loader connection information and the associated entities will continue to work.
Note: You cannot delete a loader connection as that will delete the data connection reference information the entities store. You can disable a loader connection. Once disabled, a loader connection is no longer accessible from the Create Entity Wizard in the Control Center.