Final answer:
A query that extracts purchases without a corresponding disburse cash event will give a list of unpaid transactions.
Step-by-step explanation:
When running a query that extracts all purchases for a given time period, and if there is no corresponding disburse cash event, the result will be a list of purchases that have not been paid for. This query can be useful in identifying unpaid transactions or tracking outstanding balances. For example, in a business setting, it can be used to find customers who have not yet made payments for their purchases.