When you replicate data to a database table or flat file, the replication task names each database table or flat file based on the corresponding source object name.
By default, the replication task includes the target prefix SF_. For example, the default flat file name for the Account Salesforce object is SF_ACCOUNT.CSV. If you remove the default target prefix and do not specify another prefix, the replication task creates a flat file or database table with the same name as the corresponding source object.
You can use target prefixes to prevent overwriting data. For example, you and another user share a database user account. The other user ran a replication task on the Contact object from her Salesforce account. Her replication task created a database table named Contact in the shared database. You use no target prefix and run a replication task on the Contact object from your Salesforce account. The replication task overwrites the data in the existing Contact table with your data. If you use the SF_ prefix, the replication task creates a table named SF_CONTACT and does not overwrite the existing table named Contact.