Chapter 8: Managing Your Data
Salesforce provides two main tools for importing, updating, transferring, and deleting data. The Import Wizard takes you through data management step by step. The Data Loader runs as a separate application on Windows machines. Both tools work with CSV (comma-separated values) files, which should begin with a row of column headers, and include one record per row in the rest of the file.
Import Records with the Data Loader
Update Records with the Data Loader