Selecting Key Fields
You can select a key field while creating a supplemental table or after the data source has been created.
Note: To modify the key fields later, click 
next to its name in the Folders list, and choose Change Key Fields from the pop-up menu.
Selecting Data Extraction Fields
If the data source is to be used as a supplemental data table, select the fields for intelligent data extraction. Data extraction fields are used to combine records from this table with records from other tables to generate composite profiles for each campaign recipient or form submitter.
To select key fields:
- Select up to four fields in the Data Extraction Fields list.
- Click Next.
If you are creating a data source, go to the next step.