Final answer:
The operation that would be used to total purchases for each individual purchase agent is GROUP BY.
Step-by-step explanation:
The operation that would be used to total purchases for each individual purchase agent is GROUP BY.
GROUP BY is a clause in SQL that is used to group rows based on a specified column, in this case the purchase agent. It allows for aggregating values, such as summing the purchases, for each group.
For example, if a table contains columns for purchase agent name and purchase amount, you can use the GROUP BY clause to calculate the total purchases for each individual agent.