Detect Duplicate Product Purchases in Microsoft Access

In this Microsoft Access tutorial, I will show you how to detect duplicate product purchases by a customer, specifically focusing on memberships. Learn to create a query that identifies customers who may have enrolled in the same membership multiple times, preventing double billing and ensuring accurate records.

Phoebe from Roswell, Georgia (a Platinum Member) asks: My products include memberships. How can I verify if a customer has purchased the same membership twice? Most of our purchases are unique one-offs, but sometimes a customer enrolls in the same membership more than once and then gets billed twice. I would like to be able to run a weekly query to see if any customers have duplicated their purchases. If they purchased another membership for a different person, it would go on a new customer record.

Members

There is no extended cut, but here is the database download:

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Prerequisites

• Aggregate Query
• Query Criteria

Links

• Prevent Duplicates
• Alias

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Keywords

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