When transferring a large dataset from an external file or a data extension, use the Data Copy or Import activity to help prevent data loss, minimize downtime, and maintain business continuity. With the Data Copy or Import activity, you can also manage data transfers without using complex SQL queries.
- Import or Copy a Large Dataset Using a Data Extension as the Source
Use the Data Copy or Import activity to copy data between data extensions and eliminate the need for complex SQL queries. You can use a data extension as the source to update another data extension but not a subscriber list. To update a subscriber list, use an external file. - Import or Copy a Large Dataset Using an External File as the Source
Use an external file with the Automation Studio Data Copy or Import (formerly Import File) activity to update a list or data extension.