The relevant Select options become available.
If the table you select under Choose Audience (that is, the output audience) is not normalized, there might be duplication in your results. You can use a
Based On method for
Campaign to use when selecting records, to avoid duplication. (For example, if your results might include more than one individual in the same household, you can use
Based On to select only one individual from that household, based on the criterion you configure in this feature.)
This option lets you select the <Input Audience Level> ID, where the number of occurrences of the
<Input Audience Level> ID satisfies the specified condition.
Enter or build a valid query expression, then click OK to save your entry and close the Specify Selection Criteria window.
Use the Filter function to reduce the number the IDs that will be available to the
Based On calculation. For example, you might want to select customer IDs based on their average account balance in the last six months, but before doing that, you would want to filter out all customers whose accounts are inactive.
To filter records before performing the Based On computation, click
Filter. The Specify Selection Criteria window appears. You can enter a query expression to specify which records will be used in the
Based On calculation. The filtering criteria is applied before performing the
Based On calculation, allowing you to remove records from consideration.