Your profile list is named CONTACTS. Your supplemental table is ORDERS with a Data Extraction Key of CUSTOMER_ID_ and a Primary Key of ORDER_ID, with TOTAL_ORDER_DOLLARS as a column. You design a campaign to display the ORDER_ID and TOTAL_ORDER_DOLLARS with a default value of 0 (zero) from the ORDERS table for each recipient in the target audience from your CONTACTS list.
What happens if there are multiple matches (more than one ORDER_ID) for a CUSTOMER_ID?
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