Many-to-Many Relationships in Microsoft Access

Learn how to create a many-to-many relationship in Microsoft Access. This is useful to track relationships between multiple records on BOTH sides of the relationships. For example: students to classes. Each student can be enrolled in multiple classes, and each class can contain multiple students. I'll show you how to set up a Junction Table to track these relationships.

Lucas in Anchorage, Alaska (a Platinum Member) asks: "I need to track employee training, when they took the certification test, and when their certification expires. I need a list of which employees have certifications expiring soon so that I can send them for retesting. I'm having trouble matching up the employee to the certification. Can you help?"

Members

I'll show you how to build the forms necessary to make working with these relationships easy. We'll go both ways: we'll build a customer form that will show all of their courses in a subform, and then a course subform that will show all of the enrolled customers in the subform. We'll make a double-click event to update the course date, and then an After Update event to set the expiration date equal to a year in the future. Then we'll make a query showing all of the customers who have certifications that are expired or are expiring in the next 30 days.

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Links

Relationships: https://599cd.com/Relationship
After Update: https://599cd.com/AfterUpdate
Dlookup: https://599cd.com/Dlookup
Access Expert 7: https://599cd.com/ACX7
Relationship Seminar: https://599cd.com/RelationshipSeminar
AccessDev.NET: http://AccessDev.NET
Theory: https://en.wikipedia.org/wiki/Many-to-many_(data_model)

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Keywords

#msaccess, Microsoft Access, teacher, training, certifications, tracking, many-to-many, many to many, courses, junction table, class enrollments, books to authors, students to classes, employees to certifications, products to manufacturers, songs to artists